TY  - JOUR
AU  - Zlatanović, Dragan
AU  - Pezo, Lato
AU  - Sedmak, Aleksandar
AU  - Kirin, Snežana
PY  - 2017
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2608
AB  - Expression "Development conditions and perspectives" became important for numerous analyses in various industrial and social areas. Several strategic documents and studies in last two decades analysed projects with topics on perspectives of future development in Serbia. Various tools are used for development of such documents, based on recent scientific and numerical solutions, thus providing reliable assessment for strategic decision making. Almost all analyses tried to implement the theories and practical experiences through the prism of "sustainable development", which included establishment of most important sitstainability parameters. Analysis and ranking presented in this paper considered the potential of the Stavalj coal deposit, near city of Sjenica in Serbia, and feasibility of construction project of new mine and thermal power plant. Basis for analysis was a hybrid assessment model which takes into account principles of sustainable development. The model incorporates quantified SWOT analysis, which applies to active underground mines in Serbia. Special attention was given to the parameters describing potential for development.
PB  - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
T2  - Thermal Science
T1  - Importance of on-time decision making in energy sector based on perspectives case study new stavalj project
EP  - 1935
IS  - 5
SP  - 1925
VL  - 21
DO  - 10.2298/TSCI160828088Z
ER  - 

@article{
author = "Zlatanović, Dragan and Pezo, Lato and Sedmak, Aleksandar and Kirin, Snežana",
year = "2017",
abstract = "Expression "Development conditions and perspectives" became important for numerous analyses in various industrial and social areas. Several strategic documents and studies in last two decades analysed projects with topics on perspectives of future development in Serbia. Various tools are used for development of such documents, based on recent scientific and numerical solutions, thus providing reliable assessment for strategic decision making. Almost all analyses tried to implement the theories and practical experiences through the prism of "sustainable development", which included establishment of most important sitstainability parameters. Analysis and ranking presented in this paper considered the potential of the Stavalj coal deposit, near city of Sjenica in Serbia, and feasibility of construction project of new mine and thermal power plant. Basis for analysis was a hybrid assessment model which takes into account principles of sustainable development. The model incorporates quantified SWOT analysis, which applies to active underground mines in Serbia. Special attention was given to the parameters describing potential for development.",
publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd",
journal = "Thermal Science",
title = "Importance of on-time decision making in energy sector based on perspectives case study new stavalj project",
pages = "1935-1925",
number = "5",
volume = "21",
doi = "10.2298/TSCI160828088Z"
}

Zlatanović, D., Pezo, L., Sedmak, A.,& Kirin, S.. (2017). Importance of on-time decision making in energy sector based on perspectives case study new stavalj project. in Thermal Science
Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 21(5), 1925-1935.
https://doi.org/10.2298/TSCI160828088Z

Zlatanović D, Pezo L, Sedmak A, Kirin S. Importance of on-time decision making in energy sector based on perspectives case study new stavalj project. in Thermal Science. 2017;21(5):1925-1935.
doi:10.2298/TSCI160828088Z .

Zlatanović, Dragan, Pezo, Lato, Sedmak, Aleksandar, Kirin, Snežana, "Importance of on-time decision making in energy sector based on perspectives case study new stavalj project" in Thermal Science, 21, no. 5 (2017):1925-1935,
https://doi.org/10.2298/TSCI160828088Z . .

TY  - JOUR
AU  - Pezo, Milada
AU  - Pezo, Lato
AU  - Čolović, Radmilo
AU  - Vukmirović, Đuro
AU  - Šuput, Danijela
AU  - Stanojlović, Sanja
AU  - Kosanić, Nenad
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2262
AB  - Statičke mešalice se koriste za mešanje pre glavnog procesa mešanja, čime se značajno smanje vreme mešanja i potrošnja energije. U ovom radu, prikazana je upotreba metode diskretnih elemenata (engl. Discrete Element Method - DEM) na modelovanje mešanja granula u različitim konfiguracijama statičkih mešača (korišćene su različite Komax i Ross konfiguracije za mešanje). Za modelovanje protoka fluida primenjena je metoda numeričke mehanike fluida (engl. Computational Fluid Dynamic - CFD), korišćenjem Ojlerovog dvofaznog modela. Povezivanjem rezultata ove dve metode dobija se pouzdan, dovoljno tačan i adekvatan model koji daje rezultate koji odgovaraju eksperimentalnim merenjima. Statičke mešalice se široko koriste u industiji prerade hrane, farmaceutskoj ili hemijskoj industriji. Ovaj tip mešalice se koristi uglavnom kao predmešač, pre glavnog mešanja, pri čemu se značajno smanjuje vreme mešanja i štedi energija. Za potrebe ovog rada, napravljene su statičke mešalice tipa Ross i Komax od providnog pleksiglasa, dizajnirane u CAD paketu, napravljene korišćenjem CNC glodalice. Pošto su napravljeni elementi bili prozirni, praćenje procesa mešanja granula je bilo i vizuelno. Praćene su i analizirane trajektorije, brzine i ubrzanja čestica, u cilju procene kvaliteta procesa mešanja. Glavni cilj ovog članka je da određivanje ponašanja granula koje se gravitaciono transportuju u različitim konfiguracijama mešalica i odabir najbolje konfiguracije mešalice, uzimajući u obzir ukupnu trajektoriju granule, broj elemenata za mešanje i kvalitet dobijene smeše. Rezultati numeričke simulacije statičkih mešalica upoređeni su sa eksperimentalnim rezultatima, a kvalitet mešanja ispitivan je kriterijumom relativne standardne devijacije. Uticaji tipa mešalice i broja elemenata za mešanje na proces mešanja su proučavani analizom varijanse (ANOVA).
AB  - Static mixer is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. In this article, the novel numerical approach called Discrete Element Method is used for modeling of granular flow in multiple static mixer applications, while the Computational Fluid Dynamic method was chosen for fluid flow modeling. The main aim of this article is to predict the behaviour of granules being gravitationally transported in different mixer configuration and to choose the best configuration of the mixer taking into account the total particle path, the number of mixing elements and the quality of the obtained mixture. The results of the numerical simulations in the static mixers were compared to experimental results, the mixing quality is examined by relative standard deviation criterion. The effects of the mixer type and the number of mixing elements on mixing process were studied using analysis of variance (ANOVA).
PB  - Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad
T2  - Journal on Processing and Energy in Agriculture
T1  - DEM analiza protoka zrnastog materijala u statičkoj mešalici
T1  - DEM analysis of the granular flow in the static mixers
EP  - 139
IS  - 3
SP  - 136
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2262
ER  - 

@article{
author = "Pezo, Milada and Pezo, Lato and Čolović, Radmilo and Vukmirović, Đuro and Šuput, Danijela and Stanojlović, Sanja and Kosanić, Nenad",
year = "2016",
abstract = "Statičke mešalice se koriste za mešanje pre glavnog procesa mešanja, čime se značajno smanje vreme mešanja i potrošnja energije. U ovom radu, prikazana je upotreba metode diskretnih elemenata (engl. Discrete Element Method - DEM) na modelovanje mešanja granula u različitim konfiguracijama statičkih mešača (korišćene su različite Komax i Ross konfiguracije za mešanje). Za modelovanje protoka fluida primenjena je metoda numeričke mehanike fluida (engl. Computational Fluid Dynamic - CFD), korišćenjem Ojlerovog dvofaznog modela. Povezivanjem rezultata ove dve metode dobija se pouzdan, dovoljno tačan i adekvatan model koji daje rezultate koji odgovaraju eksperimentalnim merenjima. Statičke mešalice se široko koriste u industiji prerade hrane, farmaceutskoj ili hemijskoj industriji. Ovaj tip mešalice se koristi uglavnom kao predmešač, pre glavnog mešanja, pri čemu se značajno smanjuje vreme mešanja i štedi energija. Za potrebe ovog rada, napravljene su statičke mešalice tipa Ross i Komax od providnog pleksiglasa, dizajnirane u CAD paketu, napravljene korišćenjem CNC glodalice. Pošto su napravljeni elementi bili prozirni, praćenje procesa mešanja granula je bilo i vizuelno. Praćene su i analizirane trajektorije, brzine i ubrzanja čestica, u cilju procene kvaliteta procesa mešanja. Glavni cilj ovog članka je da određivanje ponašanja granula koje se gravitaciono transportuju u različitim konfiguracijama mešalica i odabir najbolje konfiguracije mešalice, uzimajući u obzir ukupnu trajektoriju granule, broj elemenata za mešanje i kvalitet dobijene smeše. Rezultati numeričke simulacije statičkih mešalica upoređeni su sa eksperimentalnim rezultatima, a kvalitet mešanja ispitivan je kriterijumom relativne standardne devijacije. Uticaji tipa mešalice i broja elemenata za mešanje na proces mešanja su proučavani analizom varijanse (ANOVA)., Static mixer is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. In this article, the novel numerical approach called Discrete Element Method is used for modeling of granular flow in multiple static mixer applications, while the Computational Fluid Dynamic method was chosen for fluid flow modeling. The main aim of this article is to predict the behaviour of granules being gravitationally transported in different mixer configuration and to choose the best configuration of the mixer taking into account the total particle path, the number of mixing elements and the quality of the obtained mixture. The results of the numerical simulations in the static mixers were compared to experimental results, the mixing quality is examined by relative standard deviation criterion. The effects of the mixer type and the number of mixing elements on mixing process were studied using analysis of variance (ANOVA).",
publisher = "Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad",
journal = "Journal on Processing and Energy in Agriculture",
title = "DEM analiza protoka zrnastog materijala u statičkoj mešalici, DEM analysis of the granular flow in the static mixers",
pages = "139-136",
number = "3",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2262"
}

Pezo, M., Pezo, L., Čolović, R., Vukmirović, Đ., Šuput, D., Stanojlović, S.,& Kosanić, N.. (2016). DEM analiza protoka zrnastog materijala u statičkoj mešalici. in Journal on Processing and Energy in Agriculture
Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad., 20(3), 136-139.
https://hdl.handle.net/21.15107/rcub_machinery_2262

Pezo M, Pezo L, Čolović R, Vukmirović Đ, Šuput D, Stanojlović S, Kosanić N. DEM analiza protoka zrnastog materijala u statičkoj mešalici. in Journal on Processing and Energy in Agriculture. 2016;20(3):136-139.
https://hdl.handle.net/21.15107/rcub_machinery_2262 .

Pezo, Milada, Pezo, Lato, Čolović, Radmilo, Vukmirović, Đuro, Šuput, Danijela, Stanojlović, Sanja, Kosanić, Nenad, "DEM analiza protoka zrnastog materijala u statičkoj mešalici" in Journal on Processing and Energy in Agriculture, 20, no. 3 (2016):136-139,
https://hdl.handle.net/21.15107/rcub_machinery_2262 .

TY  - JOUR
AU  - Pezo, Lato
AU  - Pezo, Milada
AU  - Jovanović, Aca
AU  - Lončar, Biljana
AU  - Filipović, Vladimir
AU  - Nićetin, Milica
AU  - Kosanić, Nenad
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2260
AB  - Pužni transporteri imaju široku primenu u prehrambenoj industriji, građevinskim i rudarskim kompanijima, u hemijskoj, poljoprivrednoj i prerađivačkoj industriji, uglavnom za podizanje i / ili transport rasutih materijala na kratkim i srednjim rastojanjima. Uprkos njihovoj očiglednoj jednostavnosti, poboljšanje transportnih parametara je veoma zahtevan zadatak i inženjeri obično moraju da se oslanjaju na podatke dobijene empirijskim istraživanjima. U ovom radu, ispitivano je petnaest horizontalnih pužnih transportera sa konstantnim korakom pužnice, različite dužine, sa modifikovanom geometrijom. Ovi puževi su ispitivani radi mogućnosti pomoćnog mešanja tokom transporta materijala. Sva ispitivanja su rađena eksperimentalno i numerički, pomoću metode diskretnih elemenata (Discrete Element Method - DEM). Uticaji dužine puža, kao i predložene modifikacije geometrije u dizajnu pužne spirale, ipitivani su radi pomoćnog mešanja, tokom transporta granulisanog materijala kroz pužni transporter. Pomoćno mešanje (koje se koristi se za poboljšanje finalnog procesa mešanja) je postignuto tokom transporta materijala. Geometrija pužnog transportera se menja dodavanjem tri komplementarne spirale orijentisane u istom ili suprotnom smeru od pužne spirale. Čestice materijala se transportuju padaju dole sa vrha spirale do sledeće slobodne površine, i taj segment spirale je korišćen za dodatnu akciju mešanje. Prema eksperimentima i DEM analizema trajektorija čestice se povećava, sa primenjenim modifikacijama transportera, a ovakva geometrija može se koristiti za povećanje kvaliteta finalnog mešanja.
AB  - Fifteen horizontal single-pitch screw conveyors with modified geometry and the different lengths were investigated for premixing action, during the transport of materials. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The influences of screw length, observed geometry variations and different types of screw design, on the performances of the screw conveyor-mixer during material transport were explored. The auxiliary mixing action was achieved during the transport of the material. The geometry of the screw conveyor is changed by adding three complementary helices oriented in the same or the opposite direction from screw blades. The particles of the material being transported tumble down from the top of the helix to the next free surface, and that segment of helix was used for additional mixing action. According to DEM analysis, particle path length is increased, and the improved geometry could be determined for increasing the quality of mixing.
PB  - Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad
T2  - Journal on Processing and Energy in Agriculture
T1  - Primena modela diskretnih elemenata na protok zrnastog materijala u pužnom transporteru
T1  - Application of discrete element method for the transportat of seed in screw conveyor
EP  - 32
IS  - 1
SP  - 29
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_machinery_2260
ER  - 

@article{
author = "Pezo, Lato and Pezo, Milada and Jovanović, Aca and Lončar, Biljana and Filipović, Vladimir and Nićetin, Milica and Kosanić, Nenad",
year = "2016",
abstract = "Pužni transporteri imaju široku primenu u prehrambenoj industriji, građevinskim i rudarskim kompanijima, u hemijskoj, poljoprivrednoj i prerađivačkoj industriji, uglavnom za podizanje i / ili transport rasutih materijala na kratkim i srednjim rastojanjima. Uprkos njihovoj očiglednoj jednostavnosti, poboljšanje transportnih parametara je veoma zahtevan zadatak i inženjeri obično moraju da se oslanjaju na podatke dobijene empirijskim istraživanjima. U ovom radu, ispitivano je petnaest horizontalnih pužnih transportera sa konstantnim korakom pužnice, različite dužine, sa modifikovanom geometrijom. Ovi puževi su ispitivani radi mogućnosti pomoćnog mešanja tokom transporta materijala. Sva ispitivanja su rađena eksperimentalno i numerički, pomoću metode diskretnih elemenata (Discrete Element Method - DEM). Uticaji dužine puža, kao i predložene modifikacije geometrije u dizajnu pužne spirale, ipitivani su radi pomoćnog mešanja, tokom transporta granulisanog materijala kroz pužni transporter. Pomoćno mešanje (koje se koristi se za poboljšanje finalnog procesa mešanja) je postignuto tokom transporta materijala. Geometrija pužnog transportera se menja dodavanjem tri komplementarne spirale orijentisane u istom ili suprotnom smeru od pužne spirale. Čestice materijala se transportuju padaju dole sa vrha spirale do sledeće slobodne površine, i taj segment spirale je korišćen za dodatnu akciju mešanje. Prema eksperimentima i DEM analizema trajektorija čestice se povećava, sa primenjenim modifikacijama transportera, a ovakva geometrija može se koristiti za povećanje kvaliteta finalnog mešanja., Fifteen horizontal single-pitch screw conveyors with modified geometry and the different lengths were investigated for premixing action, during the transport of materials. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The influences of screw length, observed geometry variations and different types of screw design, on the performances of the screw conveyor-mixer during material transport were explored. The auxiliary mixing action was achieved during the transport of the material. The geometry of the screw conveyor is changed by adding three complementary helices oriented in the same or the opposite direction from screw blades. The particles of the material being transported tumble down from the top of the helix to the next free surface, and that segment of helix was used for additional mixing action. According to DEM analysis, particle path length is increased, and the improved geometry could be determined for increasing the quality of mixing.",
publisher = "Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad",
journal = "Journal on Processing and Energy in Agriculture",
title = "Primena modela diskretnih elemenata na protok zrnastog materijala u pužnom transporteru, Application of discrete element method for the transportat of seed in screw conveyor",
pages = "32-29",
number = "1",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_machinery_2260"
}

Pezo, L., Pezo, M., Jovanović, A., Lončar, B., Filipović, V., Nićetin, M.,& Kosanić, N.. (2016). Primena modela diskretnih elemenata na protok zrnastog materijala u pužnom transporteru. in Journal on Processing and Energy in Agriculture
Nacionalno društvo za procesnu tehniku i energetiku u poljoprivredi, Novi Sad., 20(1), 29-32.
https://hdl.handle.net/21.15107/rcub_machinery_2260

Pezo L, Pezo M, Jovanović A, Lončar B, Filipović V, Nićetin M, Kosanić N. Primena modela diskretnih elemenata na protok zrnastog materijala u pužnom transporteru. in Journal on Processing and Energy in Agriculture. 2016;20(1):29-32.
https://hdl.handle.net/21.15107/rcub_machinery_2260 .

Pezo, Lato, Pezo, Milada, Jovanović, Aca, Lončar, Biljana, Filipović, Vladimir, Nićetin, Milica, Kosanić, Nenad, "Primena modela diskretnih elemenata na protok zrnastog materijala u pužnom transporteru" in Journal on Processing and Energy in Agriculture, 20, no. 1 (2016):29-32,
https://hdl.handle.net/21.15107/rcub_machinery_2260 .

TY  - JOUR
AU  - Ludajić, Gordana I.
AU  - Pezo, Lato
AU  - Filipović, Jelena S.
AU  - Filipović, Vladimir S.
AU  - Kosanić, Nenad
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2458
AB  - The bread wheat bran is used as a raw material rich in dietary fiber in the production. Therefore, it is necessary to monitor the content of essential and toxic elements in the flour and bran. This paper investigates essential (Zn, Cu, Fe and Mn) and toxic (Pb, Cd, Hg and As) elements in products of milling wheat grown in the whole territory of Banat, the region in Serbia. Inductively coupled plasma mass spectrometry was used for analysis. The mean contents of the following elements Pb, Cd, Hg, As, Fe, Mn and Zn in wheat kernels were 0.143, 0.007, 0.017, 35.7643, 50.865 and 21.174 mg/kg, respectively. Cluster analysis (CA) and principal component analysis (PCA) was applied to discriminate and to group the different samples, according to element content. Quality results show that the first two principal components, accounting for 80.17% of the total variance, can be considered sufficient for data representation and the first two principal components of toxic elements and essential microelements. Cd (15.28%), Zn (17.91%), Cu (17.08), Fe (16.91%) and Mn (17.54%), have been found the most influential for the first factor coordinate calculation, while the contribution of Pb (27.93%) and Hg (61.86%) has been the most important variable for the second factor coordinate calculation.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Determination of essential and toxic elements in products of milling wheat
EP  - 715
IS  - 6
SP  - 707
VL  - 70
DO  - 10.2298/HEMIND151119008L
ER  - 

@article{
author = "Ludajić, Gordana I. and Pezo, Lato and Filipović, Jelena S. and Filipović, Vladimir S. and Kosanić, Nenad",
year = "2016",
abstract = "The bread wheat bran is used as a raw material rich in dietary fiber in the production. Therefore, it is necessary to monitor the content of essential and toxic elements in the flour and bran. This paper investigates essential (Zn, Cu, Fe and Mn) and toxic (Pb, Cd, Hg and As) elements in products of milling wheat grown in the whole territory of Banat, the region in Serbia. Inductively coupled plasma mass spectrometry was used for analysis. The mean contents of the following elements Pb, Cd, Hg, As, Fe, Mn and Zn in wheat kernels were 0.143, 0.007, 0.017, 35.7643, 50.865 and 21.174 mg/kg, respectively. Cluster analysis (CA) and principal component analysis (PCA) was applied to discriminate and to group the different samples, according to element content. Quality results show that the first two principal components, accounting for 80.17% of the total variance, can be considered sufficient for data representation and the first two principal components of toxic elements and essential microelements. Cd (15.28%), Zn (17.91%), Cu (17.08), Fe (16.91%) and Mn (17.54%), have been found the most influential for the first factor coordinate calculation, while the contribution of Pb (27.93%) and Hg (61.86%) has been the most important variable for the second factor coordinate calculation.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Determination of essential and toxic elements in products of milling wheat",
pages = "715-707",
number = "6",
volume = "70",
doi = "10.2298/HEMIND151119008L"
}

Ludajić, G. I., Pezo, L., Filipović, J. S., Filipović, V. S.,& Kosanić, N.. (2016). Determination of essential and toxic elements in products of milling wheat. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 70(6), 707-715.
https://doi.org/10.2298/HEMIND151119008L

Ludajić GI, Pezo L, Filipović JS, Filipović VS, Kosanić N. Determination of essential and toxic elements in products of milling wheat. in Hemijska Industrija. 2016;70(6):707-715.
doi:10.2298/HEMIND151119008L .

Ludajić, Gordana I., Pezo, Lato, Filipović, Jelena S., Filipović, Vladimir S., Kosanić, Nenad, "Determination of essential and toxic elements in products of milling wheat" in Hemijska Industrija, 70, no. 6 (2016):707-715,
https://doi.org/10.2298/HEMIND151119008L . .

TY  - JOUR
AU  - Pezo, Lato
AU  - Pezo, Milada
AU  - Jovanović, Aca
AU  - Kosanić, Nenad
AU  - Petrović, Aleksandar
AU  - Lević, Ljubinko
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2491
AB  - The mixing process greatly influences the mixing efficiency, as well as the quality and the price of the intermediate and/or the final product. Static mixer is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. This type of premixing action is not investigated in detail in the open literature. In this article, the novel numerical approach called Discrete Element Method is used for modelling of granular flow in multiple static mixer applications (1-3 Komax or Ross mixing elements were utilized), while the Computational Fluid Dynamic Method was chosen for fluid flow modelling, using the Eulerian multiphase model. The main aim of this article is to predict the behavior of granules being gravitationally transported in different mixer configuration and to choose the best configuration of the mixer taking into account the total particle path, the number of mixing elements and the quality of the obtained mixture. The results of the numerical simulations in the static mixers were compared to experimental results, the mixing quality is examined by RSD (relative standard deviation) criterion, and the effects on the mixer type and the number of mixing elements on mixing process were studied. The effects of the mixer type and the number of mixing elements on mixing process were studied using analysis of variance (ANOVA). Mathematical modelling is used for optimization of number of Ross and Komax segments in mixer in order to gain desirable mixing results.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Granular flow in static mixers by coupled DEM/CFD approach
EP  - 546
IS  - 5
SP  - 539
VL  - 70
DO  - 10.2298/HEMIND151013060P
ER  - 

@article{
author = "Pezo, Lato and Pezo, Milada and Jovanović, Aca and Kosanić, Nenad and Petrović, Aleksandar and Lević, Ljubinko",
year = "2016",
abstract = "The mixing process greatly influences the mixing efficiency, as well as the quality and the price of the intermediate and/or the final product. Static mixer is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. This type of premixing action is not investigated in detail in the open literature. In this article, the novel numerical approach called Discrete Element Method is used for modelling of granular flow in multiple static mixer applications (1-3 Komax or Ross mixing elements were utilized), while the Computational Fluid Dynamic Method was chosen for fluid flow modelling, using the Eulerian multiphase model. The main aim of this article is to predict the behavior of granules being gravitationally transported in different mixer configuration and to choose the best configuration of the mixer taking into account the total particle path, the number of mixing elements and the quality of the obtained mixture. The results of the numerical simulations in the static mixers were compared to experimental results, the mixing quality is examined by RSD (relative standard deviation) criterion, and the effects on the mixer type and the number of mixing elements on mixing process were studied. The effects of the mixer type and the number of mixing elements on mixing process were studied using analysis of variance (ANOVA). Mathematical modelling is used for optimization of number of Ross and Komax segments in mixer in order to gain desirable mixing results.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Granular flow in static mixers by coupled DEM/CFD approach",
pages = "546-539",
number = "5",
volume = "70",
doi = "10.2298/HEMIND151013060P"
}

Pezo, L., Pezo, M., Jovanović, A., Kosanić, N., Petrović, A.,& Lević, L.. (2016). Granular flow in static mixers by coupled DEM/CFD approach. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 70(5), 539-546.
https://doi.org/10.2298/HEMIND151013060P

Pezo L, Pezo M, Jovanović A, Kosanić N, Petrović A, Lević L. Granular flow in static mixers by coupled DEM/CFD approach. in Hemijska Industrija. 2016;70(5):539-546.
doi:10.2298/HEMIND151013060P .

Pezo, Lato, Pezo, Milada, Jovanović, Aca, Kosanić, Nenad, Petrović, Aleksandar, Lević, Ljubinko, "Granular flow in static mixers by coupled DEM/CFD approach" in Hemijska Industrija, 70, no. 5 (2016):539-546,
https://doi.org/10.2298/HEMIND151013060P . .

TY  - JOUR
AU  - Jovanović, Aca
AU  - Pezo, Lato
AU  - Stanojlović, Sanja
AU  - Kosanić, Nenad
AU  - Lević, Ljubinko
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2091
AB  - Pužni transporteri se veoma intenzivno koriste u industriji za proizvodnju i preradu hrane, plastike, mineralnih sirovina, u poljoprivrednoj proizvodnji kao i u prerađivačkoj industriji za podizanje i/ili transport rasutih materijala na kratkim i srednjim rastojanjima. Uprkos njihovoj očiglednoj konstrukcionoj jednostavnosti, sam čin transporta je veoma složen za razumevanje i konstruktori se često oslanjaju na iskustvene podatke pri konstruisanju i izradi. Osobine pužnih transportera su određene radnim uslovima (kao što su: brzinu rotacije vratila puža, ugao pod kojim je nagnut pužni transporter, nivo zapreminskog punjenja puža, itd.). U ovom radu je opisano nekoliko horizontalnih puževa, konstantne dužine koraka, pri čemu su geometrije pužnih spirala neznatno izmenjene radi ispitivanja procesa mešanja tokom transporta, korišćenjem metode diskretnih elemenata (Discrete Element Method - DEM). Ispitivani su uticaji geometrijskih izmena na osobine pužnog transportera, različita konstrukciona rešenja pužne spirale su međusobno poređena, kao i efekti geometrijskih izmena na mešanje u toku transporta. Tokom transporta u pužnom transporteru, čestice padaju sa vrha pužne spirale na prvu sledeću slobodnu površinu pužne spirale i taj segment putanje čestice može da bude iskorišćen za dopunsko mešanje materijala tokom transporta. Putanja čestice se drastično povećava ugradnjom tri dodatne zavojne površine usmerene u istom pravcu kao i pužna spirala (1458,2 mm u poređenju sa 397,6 mm u slučaju pužnog transportera sa jednom spiralom). Skraćivanjem dodatnih zavojnica, koje su usmerene u istom smeru kao i pužna spirala, unekoliko se smanjuje putanja čestice, na dužinu od 1728,8 mm (usled prekidanja zavojnice na sredini pužnog transportera). Putanja čestice se produžava na 1764.4 mm, kada se ugrade dodatne zavojne površine koje su usmerene u suprotnom pravcu od pravca pužne spirale. Ugradnjom tri dodatna pravolinijske letve, dobijena je najduža putanja čestice: 2061,6 mm.
AB  - Screw conveyors are used extensively in food, plastics, mineral processing, agriculture and processing industries for elevating and/or transporting bulk materials over short to medium distances. Despite their apparent simplicity in design, the transportation action is very complex for design and constructors have tended to rely heavily on empirical performance data. Screw conveyor performance is affected by its operating conditions (such as: the rotational speed of the screw, the inclination of the screw conveyor and its volumetric fill level). In this paper, horizontal, several single-pitch screw conveyors with some geometry variations in screw blade were investigated for mixing action during transport, using Discrete Element Method (DEM). The influence of geometry modifications on the performance of screw conveyor was examined, different screw designs were compared, and the effects of geometrical variations on mixing performances during transport were explored. During the transport, the particle tumbles down from the top of the helix to the next free surface and that segment of the path was used for auxiliary mixing action. The particle path is dramatically increased with the addition of three complementary helices oriented in the same direction as screw blades (1458.2 mm compared to 397.6 mm in case of single flight screw conveyor). Transport route enlarges to 1764.4 mm, when installing helices oriented in the opposite direction from screw blades. By addition of straight line blade to single flight screw conveyor, the longest particle path is being reached: 2061.6 mm.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska Industrija
T1  - Korišćenje metode diskretnih elemenata na modelovanje pužnih transportera-miksera
T1  - Discrete element modelling of screw conveyor-mixers
EP  - 101
IS  - 1
SP  - 95
VL  - 69
DO  - 10.2298/HEMIND130412026J
ER  - 

@article{
author = "Jovanović, Aca and Pezo, Lato and Stanojlović, Sanja and Kosanić, Nenad and Lević, Ljubinko",
year = "2015",
abstract = "Pužni transporteri se veoma intenzivno koriste u industriji za proizvodnju i preradu hrane, plastike, mineralnih sirovina, u poljoprivrednoj proizvodnji kao i u prerađivačkoj industriji za podizanje i/ili transport rasutih materijala na kratkim i srednjim rastojanjima. Uprkos njihovoj očiglednoj konstrukcionoj jednostavnosti, sam čin transporta je veoma složen za razumevanje i konstruktori se često oslanjaju na iskustvene podatke pri konstruisanju i izradi. Osobine pužnih transportera su određene radnim uslovima (kao što su: brzinu rotacije vratila puža, ugao pod kojim je nagnut pužni transporter, nivo zapreminskog punjenja puža, itd.). U ovom radu je opisano nekoliko horizontalnih puževa, konstantne dužine koraka, pri čemu su geometrije pužnih spirala neznatno izmenjene radi ispitivanja procesa mešanja tokom transporta, korišćenjem metode diskretnih elemenata (Discrete Element Method - DEM). Ispitivani su uticaji geometrijskih izmena na osobine pužnog transportera, različita konstrukciona rešenja pužne spirale su međusobno poređena, kao i efekti geometrijskih izmena na mešanje u toku transporta. Tokom transporta u pužnom transporteru, čestice padaju sa vrha pužne spirale na prvu sledeću slobodnu površinu pužne spirale i taj segment putanje čestice može da bude iskorišćen za dopunsko mešanje materijala tokom transporta. Putanja čestice se drastično povećava ugradnjom tri dodatne zavojne površine usmerene u istom pravcu kao i pužna spirala (1458,2 mm u poređenju sa 397,6 mm u slučaju pužnog transportera sa jednom spiralom). Skraćivanjem dodatnih zavojnica, koje su usmerene u istom smeru kao i pužna spirala, unekoliko se smanjuje putanja čestice, na dužinu od 1728,8 mm (usled prekidanja zavojnice na sredini pužnog transportera). Putanja čestice se produžava na 1764.4 mm, kada se ugrade dodatne zavojne površine koje su usmerene u suprotnom pravcu od pravca pužne spirale. Ugradnjom tri dodatna pravolinijske letve, dobijena je najduža putanja čestice: 2061,6 mm., Screw conveyors are used extensively in food, plastics, mineral processing, agriculture and processing industries for elevating and/or transporting bulk materials over short to medium distances. Despite their apparent simplicity in design, the transportation action is very complex for design and constructors have tended to rely heavily on empirical performance data. Screw conveyor performance is affected by its operating conditions (such as: the rotational speed of the screw, the inclination of the screw conveyor and its volumetric fill level). In this paper, horizontal, several single-pitch screw conveyors with some geometry variations in screw blade were investigated for mixing action during transport, using Discrete Element Method (DEM). The influence of geometry modifications on the performance of screw conveyor was examined, different screw designs were compared, and the effects of geometrical variations on mixing performances during transport were explored. During the transport, the particle tumbles down from the top of the helix to the next free surface and that segment of the path was used for auxiliary mixing action. The particle path is dramatically increased with the addition of three complementary helices oriented in the same direction as screw blades (1458.2 mm compared to 397.6 mm in case of single flight screw conveyor). Transport route enlarges to 1764.4 mm, when installing helices oriented in the opposite direction from screw blades. By addition of straight line blade to single flight screw conveyor, the longest particle path is being reached: 2061.6 mm.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska Industrija",
title = "Korišćenje metode diskretnih elemenata na modelovanje pužnih transportera-miksera, Discrete element modelling of screw conveyor-mixers",
pages = "101-95",
number = "1",
volume = "69",
doi = "10.2298/HEMIND130412026J"
}

Jovanović, A., Pezo, L., Stanojlović, S., Kosanić, N.,& Lević, L.. (2015). Korišćenje metode diskretnih elemenata na modelovanje pužnih transportera-miksera. in Hemijska Industrija
Savez hemijskih inženjera, Beograd., 69(1), 95-101.
https://doi.org/10.2298/HEMIND130412026J

Jovanović A, Pezo L, Stanojlović S, Kosanić N, Lević L. Korišćenje metode diskretnih elemenata na modelovanje pužnih transportera-miksera. in Hemijska Industrija. 2015;69(1):95-101.
doi:10.2298/HEMIND130412026J .

Jovanović, Aca, Pezo, Lato, Stanojlović, Sanja, Kosanić, Nenad, Lević, Ljubinko, "Korišćenje metode diskretnih elemenata na modelovanje pužnih transportera-miksera" in Hemijska Industrija, 69, no. 1 (2015):95-101,
https://doi.org/10.2298/HEMIND130412026J . .