TY  - CONF
AU  - Cvetinović, Dejan
AU  - Milutinović, Nada
AU  - Erić, Aleksandar
AU  - Manić, Nebojša
AU  - Bakić, Vukman
AU  - Janković, Bojan
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7242
AB  - The aim of the article is to show the effects of the main gasifier operating parameters, such as
temperature, equivalence ratio, steam-to-fuel ratio, and gasification medium selection, on the
gasification performance of sewage sludge. Using the developed one-dimensional mathematical
thermodynamic equilibrium model for plasma and fluidized bed gasification, a comprehensive
parametric study is established. The model is based on the principle of the minimum of the Gibbs
function and uses only the ultimate and proximate analysis data as input to the model. The output
of the model gives the equilibrium composition of the gasses produced. When comparing different
gasification media, gasification with water steam gives a higher yield of H2 and CO in the syngas
produced. Further comparison of the two gasification processes in terms of energy consumption
is shown. The collected results can be useful in further analysis of the gasification processes, such
as energy and exergy analysis and kinetics.
PB  - SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems
PB  - Faculty of Mechanical Engineering and Naval Architecture, Zagreb
C3  - Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems
T1  - Gasification of Sewage Sludge: Thermodynamic Equilibrium Modeling
IS  - SDEWES2023.0003
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7242
ER  - 

@conference{
author = "Cvetinović, Dejan and Milutinović, Nada and Erić, Aleksandar and Manić, Nebojša and Bakić, Vukman and Janković, Bojan",
year = "2023",
abstract = "The aim of the article is to show the effects of the main gasifier operating parameters, such as
temperature, equivalence ratio, steam-to-fuel ratio, and gasification medium selection, on the
gasification performance of sewage sludge. Using the developed one-dimensional mathematical
thermodynamic equilibrium model for plasma and fluidized bed gasification, a comprehensive
parametric study is established. The model is based on the principle of the minimum of the Gibbs
function and uses only the ultimate and proximate analysis data as input to the model. The output
of the model gives the equilibrium composition of the gasses produced. When comparing different
gasification media, gasification with water steam gives a higher yield of H2 and CO in the syngas
produced. Further comparison of the two gasification processes in terms of energy consumption
is shown. The collected results can be useful in further analysis of the gasification processes, such
as energy and exergy analysis and kinetics.",
publisher = "SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems, Faculty of Mechanical Engineering and Naval Architecture, Zagreb",
journal = "Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems",
title = "Gasification of Sewage Sludge: Thermodynamic Equilibrium Modeling",
number = "SDEWES2023.0003",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7242"
}

Cvetinović, D., Milutinović, N., Erić, A., Manić, N., Bakić, V.,& Janković, B.. (2023). Gasification of Sewage Sludge: Thermodynamic Equilibrium Modeling. in Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems
SDEWES - International Centre for Sustainable Development of Energy, Water and Environment Systems.(SDEWES2023.0003).
https://hdl.handle.net/21.15107/rcub_machinery_7242

Cvetinović D, Milutinović N, Erić A, Manić N, Bakić V, Janković B. Gasification of Sewage Sludge: Thermodynamic Equilibrium Modeling. in Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems. 2023;(SDEWES2023.0003).
https://hdl.handle.net/21.15107/rcub_machinery_7242 .

Cvetinović, Dejan, Milutinović, Nada, Erić, Aleksandar, Manić, Nebojša, Bakić, Vukman, Janković, Bojan, "Gasification of Sewage Sludge: Thermodynamic Equilibrium Modeling" in Book of Abstracts 18th Conference on Sustainable Development of Energy, Water and Environment Systems, no. SDEWES2023.0003 (2023),
https://hdl.handle.net/21.15107/rcub_machinery_7242 .

TY  - CONF
AU  - Cvetinović, Dejan
AU  - Erić, Aleksandar
AU  - Ćetenović, Nikola
AU  - Čantrak, Đorđe
AU  - Jaroslav, Tihon
AU  - Nakabe, Kazuyoshi
PY  - 2023
UR  - http://www.ssm.kg.ac.rs/congress_2023/papers/
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6912
UR  - http://www.ssm.kg.ac.rs/congress_2023/wp-content/uploads/upload/ICSSM2023_Book_of_Proceedings.pdf
AB  - The controlled modulation of the nozzle exit velocity acts as a disturbance source, superimposing the natural disturbances in axisymmetric turbulent air jets. The modulation controls the vortex roll-up, and thus the overall vortex structure in the jet. The vortex structures have a significant influence on the heat transfer properties of the jet configurations. The jet can be modulated by an external source of low amplitude oscillations or by self-sustaining oscillations generated by the operation of the specially designed whistler nozzles. The aim of the experimental investigations, mathematical modelling and numerical simulations was to investigate the properties and vortex structures of acoustically modified and non-modified jets and to find an efficient way to control them.
This study can serve as a basis for further development and optimisation of technological processes related to air nozzles. The paper presents the results of experimental research and mathematical modelling and numerical simulation of free and impinging turbulent axisymmetric modified and not modified air jets.
PB  - Српско друштво за механику
C3  - 9th International Congress of the Serbian Society of Mechanics July 5-7, 2023, Vrnjačka Banja, Serbia
T1  - EXPERIMENTAL INVESTIGATION AND MATHEMATICAL MODELLING OF VORTEX STRUCTURES FOUND AT IMPINGING TURBULENT AXISYMETRIC AIR JET MODIFIED BY LOW-AMPLITUDE SOUND MODULATION
SP  - 144
UR  - https://hdl.handle.net/21.15107/rcub_machinery_6912
ER  - 

@conference{
author = "Cvetinović, Dejan and Erić, Aleksandar and Ćetenović, Nikola and Čantrak, Đorđe and Jaroslav, Tihon and Nakabe, Kazuyoshi",
year = "2023",
abstract = "The controlled modulation of the nozzle exit velocity acts as a disturbance source, superimposing the natural disturbances in axisymmetric turbulent air jets. The modulation controls the vortex roll-up, and thus the overall vortex structure in the jet. The vortex structures have a significant influence on the heat transfer properties of the jet configurations. The jet can be modulated by an external source of low amplitude oscillations or by self-sustaining oscillations generated by the operation of the specially designed whistler nozzles. The aim of the experimental investigations, mathematical modelling and numerical simulations was to investigate the properties and vortex structures of acoustically modified and non-modified jets and to find an efficient way to control them.
This study can serve as a basis for further development and optimisation of technological processes related to air nozzles. The paper presents the results of experimental research and mathematical modelling and numerical simulation of free and impinging turbulent axisymmetric modified and not modified air jets.",
publisher = "Српско друштво за механику",
journal = "9th International Congress of the Serbian Society of Mechanics July 5-7, 2023, Vrnjačka Banja, Serbia",
title = "EXPERIMENTAL INVESTIGATION AND MATHEMATICAL MODELLING OF VORTEX STRUCTURES FOUND AT IMPINGING TURBULENT AXISYMETRIC AIR JET MODIFIED BY LOW-AMPLITUDE SOUND MODULATION",
pages = "144",
url = "https://hdl.handle.net/21.15107/rcub_machinery_6912"
}

Cvetinović, D., Erić, A., Ćetenović, N., Čantrak, Đ., Jaroslav, T.,& Nakabe, K.. (2023). EXPERIMENTAL INVESTIGATION AND MATHEMATICAL MODELLING OF VORTEX STRUCTURES FOUND AT IMPINGING TURBULENT AXISYMETRIC AIR JET MODIFIED BY LOW-AMPLITUDE SOUND MODULATION. in 9th International Congress of the Serbian Society of Mechanics July 5-7, 2023, Vrnjačka Banja, Serbia
Српско друштво за механику., 144.
https://hdl.handle.net/21.15107/rcub_machinery_6912

Cvetinović D, Erić A, Ćetenović N, Čantrak Đ, Jaroslav T, Nakabe K. EXPERIMENTAL INVESTIGATION AND MATHEMATICAL MODELLING OF VORTEX STRUCTURES FOUND AT IMPINGING TURBULENT AXISYMETRIC AIR JET MODIFIED BY LOW-AMPLITUDE SOUND MODULATION. in 9th International Congress of the Serbian Society of Mechanics July 5-7, 2023, Vrnjačka Banja, Serbia. 2023;:144.
https://hdl.handle.net/21.15107/rcub_machinery_6912 .

Cvetinović, Dejan, Erić, Aleksandar, Ćetenović, Nikola, Čantrak, Đorđe, Jaroslav, Tihon, Nakabe, Kazuyoshi, "EXPERIMENTAL INVESTIGATION AND MATHEMATICAL MODELLING OF VORTEX STRUCTURES FOUND AT IMPINGING TURBULENT AXISYMETRIC AIR JET MODIFIED BY LOW-AMPLITUDE SOUND MODULATION" in 9th International Congress of the Serbian Society of Mechanics July 5-7, 2023, Vrnjačka Banja, Serbia (2023):144,
https://hdl.handle.net/21.15107/rcub_machinery_6912 .

TY  - CONF
AU  - Milutinović, Nada
AU  - Cvetinović, Dejan
AU  - Erić, Aleksandar M.
AU  - Živković, Nikola
AU  - Rudonja, Nedžad
AU  - Gojak, Milan
PY  - 2021
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5242
AB  - Methodology using the thermodynamic equilibrium composition calculation to optimise the high-temperature organic waste treatment in thermal plasma was developed. The methodology was demonstrated in the case of high-temperature treatment of polychlorinated biphenyl (PCB) in a thermal plasma reactor using two different working media, air and water vapour. Calculated results obtained in this analysis show composition of combustible and harmful chemical species formed in the PCB oil decomposition process. Optimisation of the composition of the combustibles can suggest the most economical parameters of the process. Toxic substances emissions are one of the limiting factors in the process of optimization. This analysis can be considered as the first step towards defining optimal operating parameters of the pilot-plasma facility for waste treatment from the ecological and economical aspects.
PB  - Society of Thermal Engineers of Serbia
C3  - Full Papers Proceedings of Power Plants 2021
T1  - THERMODYNAMIC TOOLS FOR OPTIMISATION OF THE HIGH-TEMPERATURE DECOMPOSITION OF PCB IN THERMAL PLASMA
EP  - 296
SP  - 286
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5242
ER  - 

@conference{
author = "Milutinović, Nada and Cvetinović, Dejan and Erić, Aleksandar M. and Živković, Nikola and Rudonja, Nedžad and Gojak, Milan",
year = "2021",
abstract = "Methodology using the thermodynamic equilibrium composition calculation to optimise the high-temperature organic waste treatment in thermal plasma was developed. The methodology was demonstrated in the case of high-temperature treatment of polychlorinated biphenyl (PCB) in a thermal plasma reactor using two different working media, air and water vapour. Calculated results obtained in this analysis show composition of combustible and harmful chemical species formed in the PCB oil decomposition process. Optimisation of the composition of the combustibles can suggest the most economical parameters of the process. Toxic substances emissions are one of the limiting factors in the process of optimization. This analysis can be considered as the first step towards defining optimal operating parameters of the pilot-plasma facility for waste treatment from the ecological and economical aspects.",
publisher = "Society of Thermal Engineers of Serbia",
journal = "Full Papers Proceedings of Power Plants 2021",
title = "THERMODYNAMIC TOOLS FOR OPTIMISATION OF THE HIGH-TEMPERATURE DECOMPOSITION OF PCB IN THERMAL PLASMA",
pages = "296-286",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5242"
}

Milutinović, N., Cvetinović, D., Erić, A. M., Živković, N., Rudonja, N.,& Gojak, M.. (2021). THERMODYNAMIC TOOLS FOR OPTIMISATION OF THE HIGH-TEMPERATURE DECOMPOSITION OF PCB IN THERMAL PLASMA. in Full Papers Proceedings of Power Plants 2021
Society of Thermal Engineers of Serbia., 286-296.
https://hdl.handle.net/21.15107/rcub_machinery_5242

Milutinović N, Cvetinović D, Erić AM, Živković N, Rudonja N, Gojak M. THERMODYNAMIC TOOLS FOR OPTIMISATION OF THE HIGH-TEMPERATURE DECOMPOSITION OF PCB IN THERMAL PLASMA. in Full Papers Proceedings of Power Plants 2021. 2021;:286-296.
https://hdl.handle.net/21.15107/rcub_machinery_5242 .

Milutinović, Nada, Cvetinović, Dejan, Erić, Aleksandar M., Živković, Nikola, Rudonja, Nedžad, Gojak, Milan, "THERMODYNAMIC TOOLS FOR OPTIMISATION OF THE HIGH-TEMPERATURE DECOMPOSITION OF PCB IN THERMAL PLASMA" in Full Papers Proceedings of Power Plants 2021 (2021):286-296,
https://hdl.handle.net/21.15107/rcub_machinery_5242 .

TY  - JOUR
AU  - Stefanović, Predrag Lj.
AU  - Zivković, Nikola V.
AU  - Stojiljković, Dragoslava
AU  - Jovanović, Vladimir
AU  - Erić, Milić D.
AU  - Marković, Zoran J.
AU  - Cvetinović, Dejan
PY  - 2019
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/3239
AB  - The anthropogenic emission of GHG especially CO has to be limited and reduced due to their impact on global warming and climate change. Combustion of fossil fuels in the energy sector has a dominant share in total GHG emissions. In order to reduce GHG emission, European Union established a scheme for GHG allowance trading within the community, and the implementation of the European Union emission trading scheme, which is a key to GHG reduction in a cost-effective way. An important part of emission trading scheme is prescribed methodology for monitoring, reporting, and verification of the emission of GHG including characterization of the local fuels combusted by the energy sector. This paper presents lignite characteristics from open-pit mine Borovica-Pljevlja, which has highest coal production in Montenegro (>1.2 Mt per year), including evaluation of its carbon emission factor based on the laboratory analysis of 72 coal samples. Testing of the samples included proximate and ultimate analysis, as well as, net calorific value determination. In accordance with the obtained results, linear correlations between net calorific value and combustible matter content, carbon content and combustible matter content, hydrogen content and combustible matter content, carbon content and net calorific value, were established. Finally, the non-linear analytical correlation between carbon emission factor and net calorific value for Pljevlja lignite was proposed, as a base for the precise calculation of CO emission evaluation.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Pljevlja lignite carbon emission charateristics
EP  - S1531
SP  - S1523
VL  - 23
DO  - 10.2298/TSCI180726288S
ER  - 

@article{
author = "Stefanović, Predrag Lj. and Zivković, Nikola V. and Stojiljković, Dragoslava and Jovanović, Vladimir and Erić, Milić D. and Marković, Zoran J. and Cvetinović, Dejan",
year = "2019",
abstract = "The anthropogenic emission of GHG especially CO has to be limited and reduced due to their impact on global warming and climate change. Combustion of fossil fuels in the energy sector has a dominant share in total GHG emissions. In order to reduce GHG emission, European Union established a scheme for GHG allowance trading within the community, and the implementation of the European Union emission trading scheme, which is a key to GHG reduction in a cost-effective way. An important part of emission trading scheme is prescribed methodology for monitoring, reporting, and verification of the emission of GHG including characterization of the local fuels combusted by the energy sector. This paper presents lignite characteristics from open-pit mine Borovica-Pljevlja, which has highest coal production in Montenegro (>1.2 Mt per year), including evaluation of its carbon emission factor based on the laboratory analysis of 72 coal samples. Testing of the samples included proximate and ultimate analysis, as well as, net calorific value determination. In accordance with the obtained results, linear correlations between net calorific value and combustible matter content, carbon content and combustible matter content, hydrogen content and combustible matter content, carbon content and net calorific value, were established. Finally, the non-linear analytical correlation between carbon emission factor and net calorific value for Pljevlja lignite was proposed, as a base for the precise calculation of CO emission evaluation.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Pljevlja lignite carbon emission charateristics",
pages = "S1531-S1523",
volume = "23",
doi = "10.2298/TSCI180726288S"
}

Stefanović, P. Lj., Zivković, N. V., Stojiljković, D., Jovanović, V., Erić, M. D., Marković, Z. J.,& Cvetinović, D.. (2019). Pljevlja lignite carbon emission charateristics. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 23, S1523-S1531.
https://doi.org/10.2298/TSCI180726288S

Stefanović PL, Zivković NV, Stojiljković D, Jovanović V, Erić MD, Marković ZJ, Cvetinović D. Pljevlja lignite carbon emission charateristics. in Thermal Science. 2019;23:S1523-S1531.
doi:10.2298/TSCI180726288S .

Stefanović, Predrag Lj., Zivković, Nikola V., Stojiljković, Dragoslava, Jovanović, Vladimir, Erić, Milić D., Marković, Zoran J., Cvetinović, Dejan, "Pljevlja lignite carbon emission charateristics" in Thermal Science, 23 (2019):S1523-S1531,
https://doi.org/10.2298/TSCI180726288S . .

TY  - JOUR
AU  - Marković, Zoran J.
AU  - Stupar, Slobodan
AU  - Dinulović, Mirko
AU  - Peković, Ognjen
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2304
AB  - A fuzzy approximation concept is applied in order to predict results of coupled computational structure mechanics and computational fluid dynamics while solving a problem of steady incompressible gas flow through thermally loaded rectangular thin-walled channel. Channel wall deforms into wave-type shapes depending on thermal load and fluid inlet velocity inducing the changes of fluid flow accordingly. A set of fluid-structure interaction numerical tests have been defined by varying the values of fluid inlet velocity, temperature of inner and outer surface of the channel wall, and numerical grid density. The unsteady Navier-Stokes equations are numerically solved using an element-based finite volume method and second order backward Euler discretization scheme. The structural model is solved by finite element method including geometric and material non-linearities. The implicit two-way iterative code coupling, partitioned solution approach, were used while solving these numerical tests. Results of numerical analysis indicate that gravity and pressure distribution inside the channel contributes to triggering the shape of deformation. In the inverse problem, the results of fluid-structure interaction numerical simulations formed a database of input variables for development fuzzy logic based models considering downstream pressure drop and maximum stresses as the objective functions. Developed fuzzy models predicted targeting results within a reasonable accuracy limit at lower computation cost compared to series of fluid-structure interaction numerical calculations. Smaller relative difference were obtained when calculating the values of pressure drop then maximal stresses indicating that transfer function influence on output values have to be additionally investigated.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Assessment results of fluid-structure interaction numerical simulation using fuzzy logic
EP  - S250
SP  - S235
VL  - 20
DO  - 10.2298/TSCI160111083M
ER  - 

@article{
author = "Marković, Zoran J. and Stupar, Slobodan and Dinulović, Mirko and Peković, Ognjen and Stefanović, Predrag Lj. and Cvetinović, Dejan",
year = "2016",
abstract = "A fuzzy approximation concept is applied in order to predict results of coupled computational structure mechanics and computational fluid dynamics while solving a problem of steady incompressible gas flow through thermally loaded rectangular thin-walled channel. Channel wall deforms into wave-type shapes depending on thermal load and fluid inlet velocity inducing the changes of fluid flow accordingly. A set of fluid-structure interaction numerical tests have been defined by varying the values of fluid inlet velocity, temperature of inner and outer surface of the channel wall, and numerical grid density. The unsteady Navier-Stokes equations are numerically solved using an element-based finite volume method and second order backward Euler discretization scheme. The structural model is solved by finite element method including geometric and material non-linearities. The implicit two-way iterative code coupling, partitioned solution approach, were used while solving these numerical tests. Results of numerical analysis indicate that gravity and pressure distribution inside the channel contributes to triggering the shape of deformation. In the inverse problem, the results of fluid-structure interaction numerical simulations formed a database of input variables for development fuzzy logic based models considering downstream pressure drop and maximum stresses as the objective functions. Developed fuzzy models predicted targeting results within a reasonable accuracy limit at lower computation cost compared to series of fluid-structure interaction numerical calculations. Smaller relative difference were obtained when calculating the values of pressure drop then maximal stresses indicating that transfer function influence on output values have to be additionally investigated.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Assessment results of fluid-structure interaction numerical simulation using fuzzy logic",
pages = "S250-S235",
volume = "20",
doi = "10.2298/TSCI160111083M"
}

Marković, Z. J., Stupar, S., Dinulović, M., Peković, O., Stefanović, P. Lj.,& Cvetinović, D.. (2016). Assessment results of fluid-structure interaction numerical simulation using fuzzy logic. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 20, S235-S250.
https://doi.org/10.2298/TSCI160111083M

Marković ZJ, Stupar S, Dinulović M, Peković O, Stefanović PL, Cvetinović D. Assessment results of fluid-structure interaction numerical simulation using fuzzy logic. in Thermal Science. 2016;20:S235-S250.
doi:10.2298/TSCI160111083M .

Marković, Zoran J., Stupar, Slobodan, Dinulović, Mirko, Peković, Ognjen, Stefanović, Predrag Lj., Cvetinović, Dejan, "Assessment results of fluid-structure interaction numerical simulation using fuzzy logic" in Thermal Science, 20 (2016):S235-S250,
https://doi.org/10.2298/TSCI160111083M . .

TY  - JOUR
AU  - Marković, Zoran
AU  - Stupar, Slobodan
AU  - Dinulović, Mirko
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2069
AB  - U radu su prikazani rezultati numeričkih proračuna interakcije fluid-struktura korišćenjem diskretizacionih numeričkih metoda - metode konačnih elemenata za proračun naponsko-deformacionog stanja zida kanala i metode konačnih zapremina za numerički proračun dinamike fluida. Na osnovu dobijenih rezultata razvijen je fazi ekspertski sistem za procenu izlaznih parametara numeričkog proračuna, prikazane su osnovne karakteristike razvijenog fazi modela i rezultati dobijeni njegovom primenom. Analizirani su uticaji tri ulazna parametra - temperature unutrašnje površine zida kanala, razlike između temperatura unutrašnje i spoljašnje površine zida i faktora koji definiše gustinu numeričkih mreža - na dva izlazna parametra: vrednost pada statičkog pritiska niz struju i vrednost maksimalnih kombinovanih Fon Misesovih napona ostvarenih u strukturi kanala za zadate uslove opterećenja. Na osnovu dobijenih rezultata vidimo da formirani fazi ekspertski sistem može sa zadovoljavajućom tačnošću biti iskorišćen za procenu posmatranih izlaznih veličina, pri znatno kraćem vremenu potrebnom za proračun i uz angažovanje resursa računarskog sistema u značajno manjem obimu.
AB  - This paper deal with structural deformation of one rectangular, closed, thin walled, steel made, thermally loaded channel and influence of this deformation on the air flow through the channel, recognised as coupled fluid-structure interaction problem. The geometrically non-linear deformation of thermally loaded channel was solved using commercial finite-element analysis software ANSYS. The unsteady Navier-Stokes equations in their conservation form defining fluid flow are solved using commercial computer fluid dynamics software ANSYS CFX. A fuzzy logic-based expert system has been developed to predict some results of structural and fluid flow numerical simulation instead of directly evaluating it by a time-consuming software coupling of finite-element and computer fluid dynamics numerical analysis. Three input parameters, namely temperature of channel inner walls, difference in temperature of inner and outer surface of channel wall, and factor of mesh size, are varied while solving the fluid-structure interaction problem. A pressure drop downstream the flow was considered as a computer fluid dynamics output parameter of importance, while Von Misses maximum stresses were an finite-element analysis output parameter observed. The developed FLES can predict the results of finite-element and computer fluid dynamics analysis, a pressure drop and Von Misses maximum stresses respectively, within a reasonable accuracy limit and at lower computation cost compared to the finite-element, and CFD computer fluid dynamics packages combined into series of multi-physics analyses.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd i Društvo termičara Srbije, Beograd
T2  - Termotehnika
T1  - Fazi ekspertski sistem za proračun parametara spregnute numeričke analize interakcije fluida i tankozidne strukture
T1  - Fuzzy logic expert system for calculating the parameters of coupled numerical analysis of the fluid and thin-walled structures interaction
EP  - 48
IS  - 1
SP  - 33
VL  - 41
DO  - 10.5937/termoteh1501033M
ER  - 

@article{
author = "Marković, Zoran and Stupar, Slobodan and Dinulović, Mirko and Stefanović, Predrag Lj. and Cvetinović, Dejan",
year = "2015",
abstract = "U radu su prikazani rezultati numeričkih proračuna interakcije fluid-struktura korišćenjem diskretizacionih numeričkih metoda - metode konačnih elemenata za proračun naponsko-deformacionog stanja zida kanala i metode konačnih zapremina za numerički proračun dinamike fluida. Na osnovu dobijenih rezultata razvijen je fazi ekspertski sistem za procenu izlaznih parametara numeričkog proračuna, prikazane su osnovne karakteristike razvijenog fazi modela i rezultati dobijeni njegovom primenom. Analizirani su uticaji tri ulazna parametra - temperature unutrašnje površine zida kanala, razlike između temperatura unutrašnje i spoljašnje površine zida i faktora koji definiše gustinu numeričkih mreža - na dva izlazna parametra: vrednost pada statičkog pritiska niz struju i vrednost maksimalnih kombinovanih Fon Misesovih napona ostvarenih u strukturi kanala za zadate uslove opterećenja. Na osnovu dobijenih rezultata vidimo da formirani fazi ekspertski sistem može sa zadovoljavajućom tačnošću biti iskorišćen za procenu posmatranih izlaznih veličina, pri znatno kraćem vremenu potrebnom za proračun i uz angažovanje resursa računarskog sistema u značajno manjem obimu., This paper deal with structural deformation of one rectangular, closed, thin walled, steel made, thermally loaded channel and influence of this deformation on the air flow through the channel, recognised as coupled fluid-structure interaction problem. The geometrically non-linear deformation of thermally loaded channel was solved using commercial finite-element analysis software ANSYS. The unsteady Navier-Stokes equations in their conservation form defining fluid flow are solved using commercial computer fluid dynamics software ANSYS CFX. A fuzzy logic-based expert system has been developed to predict some results of structural and fluid flow numerical simulation instead of directly evaluating it by a time-consuming software coupling of finite-element and computer fluid dynamics numerical analysis. Three input parameters, namely temperature of channel inner walls, difference in temperature of inner and outer surface of channel wall, and factor of mesh size, are varied while solving the fluid-structure interaction problem. A pressure drop downstream the flow was considered as a computer fluid dynamics output parameter of importance, while Von Misses maximum stresses were an finite-element analysis output parameter observed. The developed FLES can predict the results of finite-element and computer fluid dynamics analysis, a pressure drop and Von Misses maximum stresses respectively, within a reasonable accuracy limit and at lower computation cost compared to the finite-element, and CFD computer fluid dynamics packages combined into series of multi-physics analyses.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd i Društvo termičara Srbije, Beograd",
journal = "Termotehnika",
title = "Fazi ekspertski sistem za proračun parametara spregnute numeričke analize interakcije fluida i tankozidne strukture, Fuzzy logic expert system for calculating the parameters of coupled numerical analysis of the fluid and thin-walled structures interaction",
pages = "48-33",
number = "1",
volume = "41",
doi = "10.5937/termoteh1501033M"
}

Marković, Z., Stupar, S., Dinulović, M., Stefanović, P. Lj.,& Cvetinović, D.. (2015). Fazi ekspertski sistem za proračun parametara spregnute numeričke analize interakcije fluida i tankozidne strukture. in Termotehnika
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd i Društvo termičara Srbije, Beograd., 41(1), 33-48.
https://doi.org/10.5937/termoteh1501033M

Marković Z, Stupar S, Dinulović M, Stefanović PL, Cvetinović D. Fazi ekspertski sistem za proračun parametara spregnute numeričke analize interakcije fluida i tankozidne strukture. in Termotehnika. 2015;41(1):33-48.
doi:10.5937/termoteh1501033M .

Marković, Zoran, Stupar, Slobodan, Dinulović, Mirko, Stefanović, Predrag Lj., Cvetinović, Dejan, "Fazi ekspertski sistem za proračun parametara spregnute numeričke analize interakcije fluida i tankozidne strukture" in Termotehnika, 41, no. 1 (2015):33-48,
https://doi.org/10.5937/termoteh1501033M . .

TY  - JOUR
AU  - Jovanović, Rastko
AU  - Cvetinović, Dejan
AU  - Erić, Milić D.
AU  - Rašuo, Boško
AU  - Adžić, Miroljub
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1949
AB  - Numerical modeling is widely used tool for prediction of combustion processes. Computational Fluid Dynamics - CFD models use three kinetic rates for description of the coal combustion processes: coal devolatilization, volatile combustion and char combustion. Reported rates for coal devolatilization vary considerably among the authors depending on the type of experimental systems used in describing the phenomenon. Accurate representation of devolatilization process is necessary in order to perform successful CFD calculations of pulverized coal combustion and gasification. The subject of this work is numerical modeling of Serbian lignite pulverized coal devolatilization in drop tube type laboratory scale reactor. The aim of this study is to evaluate the influence of different devolatilization kinetic factors on total devolatilization time in numerical modeling of pulverized Serbian lignite devolatilization. Nine different devolatilization kinetic rates mostly used in devolatilization numerical modeling are compared in the presented work.
T2  - International Journal of Heat and Mass Transfer
T1  - Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process
EP  - 500
SP  - 489
VL  - 72
DO  - 10.1016/j.ijheatmasstransfer.2014.01.036
ER  - 

@article{
author = "Jovanović, Rastko and Cvetinović, Dejan and Erić, Milić D. and Rašuo, Boško and Adžić, Miroljub",
year = "2014",
abstract = "Numerical modeling is widely used tool for prediction of combustion processes. Computational Fluid Dynamics - CFD models use three kinetic rates for description of the coal combustion processes: coal devolatilization, volatile combustion and char combustion. Reported rates for coal devolatilization vary considerably among the authors depending on the type of experimental systems used in describing the phenomenon. Accurate representation of devolatilization process is necessary in order to perform successful CFD calculations of pulverized coal combustion and gasification. The subject of this work is numerical modeling of Serbian lignite pulverized coal devolatilization in drop tube type laboratory scale reactor. The aim of this study is to evaluate the influence of different devolatilization kinetic factors on total devolatilization time in numerical modeling of pulverized Serbian lignite devolatilization. Nine different devolatilization kinetic rates mostly used in devolatilization numerical modeling are compared in the presented work.",
journal = "International Journal of Heat and Mass Transfer",
title = "Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process",
pages = "500-489",
volume = "72",
doi = "10.1016/j.ijheatmasstransfer.2014.01.036"
}

Jovanović, R., Cvetinović, D., Erić, M. D., Rašuo, B.,& Adžić, M.. (2014). Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process. in International Journal of Heat and Mass Transfer, 72, 489-500.
https://doi.org/10.1016/j.ijheatmasstransfer.2014.01.036

Jovanović R, Cvetinović D, Erić MD, Rašuo B, Adžić M. Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process. in International Journal of Heat and Mass Transfer. 2014;72:489-500.
doi:10.1016/j.ijheatmasstransfer.2014.01.036 .

Jovanović, Rastko, Cvetinović, Dejan, Erić, Milić D., Rašuo, Boško, Adžić, Miroljub, "Sensitivity analysis of different kinetic factors for numerical modeling of Serbian lignite devolatilization process" in International Journal of Heat and Mass Transfer, 72 (2014):489-500,
https://doi.org/10.1016/j.ijheatmasstransfer.2014.01.036 . .

TY  - JOUR
AU  - Jovanović, Rastko
AU  - Rašuo, Boško
AU  - Stefanović, Predrag Lj.
AU  - Cvetinović, Dejan
AU  - Swiatkowski, B.
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1812
AB  - Pulverized coal combustion in mixture of oxygen and recycled flue gasses, known as oxy-fuel combustion, is considered as one of the several possible alternatives to conventional pulverized coal combustion. Switching from conventional pulverized-coal combustion to oxy-fuel combustion brings significant changes in flame properties among which the most important are ignition properties and flame stability. This paper presents the results of experimental and numerical analysis of ignition phenomena under O 2/CO2 mixtures with different oxygen content. The main focus of the presented paper is to suggest novel ignition sub-model which can describe all possible ignition mechanisms. Proposed ignition sub-model together with Large Eddy Simulation (LES) turbulence modeling enables accurate prediction of main flame characteristics: ignition point position, ignition temperature, and flame stability.
T2  - International Journal of Heat and Mass Transfer
T1  - Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions
EP  - 662
IS  - 1-2
SP  - 654
VL  - 58
DO  - 10.1016/j.ijheatmasstransfer.2012.11.070
ER  - 

@article{
author = "Jovanović, Rastko and Rašuo, Boško and Stefanović, Predrag Lj. and Cvetinović, Dejan and Swiatkowski, B.",
year = "2013",
abstract = "Pulverized coal combustion in mixture of oxygen and recycled flue gasses, known as oxy-fuel combustion, is considered as one of the several possible alternatives to conventional pulverized coal combustion. Switching from conventional pulverized-coal combustion to oxy-fuel combustion brings significant changes in flame properties among which the most important are ignition properties and flame stability. This paper presents the results of experimental and numerical analysis of ignition phenomena under O 2/CO2 mixtures with different oxygen content. The main focus of the presented paper is to suggest novel ignition sub-model which can describe all possible ignition mechanisms. Proposed ignition sub-model together with Large Eddy Simulation (LES) turbulence modeling enables accurate prediction of main flame characteristics: ignition point position, ignition temperature, and flame stability.",
journal = "International Journal of Heat and Mass Transfer",
title = "Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions",
pages = "662-654",
number = "1-2",
volume = "58",
doi = "10.1016/j.ijheatmasstransfer.2012.11.070"
}

Jovanović, R., Rašuo, B., Stefanović, P. Lj., Cvetinović, D.,& Swiatkowski, B.. (2013). Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions. in International Journal of Heat and Mass Transfer, 58(1-2), 654-662.
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.070

Jovanović R, Rašuo B, Stefanović PL, Cvetinović D, Swiatkowski B. Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions. in International Journal of Heat and Mass Transfer. 2013;58(1-2):654-662.
doi:10.1016/j.ijheatmasstransfer.2012.11.070 .

Jovanović, Rastko, Rašuo, Boško, Stefanović, Predrag Lj., Cvetinović, Dejan, Swiatkowski, B., "Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions" in International Journal of Heat and Mass Transfer, 58, no. 1-2 (2013):654-662,
https://doi.org/10.1016/j.ijheatmasstransfer.2012.11.070 . .