TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2016
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/4465
PB  - Taylor & Francis Ltd, Abingdon
T2  - Journal of Hydraulic Research
T1  - Closure to “Supercritical flow in circular conduit bends” by M. KOLAREVIC, L. SAVIC, R. KAPOR and N. MLADENOVIC, J. Hydraulic Res. 53(1), 2015, 93–100
EP  - 241
IS  - 2
SP  - 240
VL  - 54
DO  - 10.1080/00221686.2016.1143883
ER  - 

@article{
author = "Kolarević, Milena and Savić, Ljubodrag and Kapor, Radomir and Mladenović, Nikola",
year = "2016",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Journal of Hydraulic Research",
title = "Closure to “Supercritical flow in circular conduit bends” by M. KOLAREVIC, L. SAVIC, R. KAPOR and N. MLADENOVIC, J. Hydraulic Res. 53(1), 2015, 93–100",
pages = "241-240",
number = "2",
volume = "54",
doi = "10.1080/00221686.2016.1143883"
}

Kolarević, M., Savić, L., Kapor, R.,& Mladenović, N.. (2016). Closure to “Supercritical flow in circular conduit bends” by M. KOLAREVIC, L. SAVIC, R. KAPOR and N. MLADENOVIC, J. Hydraulic Res. 53(1), 2015, 93–100. in Journal of Hydraulic Research
Taylor & Francis Ltd, Abingdon., 54(2), 240-241.
https://doi.org/10.1080/00221686.2016.1143883

Kolarević M, Savić L, Kapor R, Mladenović N. Closure to “Supercritical flow in circular conduit bends” by M. KOLAREVIC, L. SAVIC, R. KAPOR and N. MLADENOVIC, J. Hydraulic Res. 53(1), 2015, 93–100. in Journal of Hydraulic Research. 2016;54(2):240-241.
doi:10.1080/00221686.2016.1143883 .

Kolarević, Milena, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Closure to “Supercritical flow in circular conduit bends” by M. KOLAREVIC, L. SAVIC, R. KAPOR and N. MLADENOVIC, J. Hydraulic Res. 53(1), 2015, 93–100" in Journal of Hydraulic Research, 54, no. 2 (2016):240-241,
https://doi.org/10.1080/00221686.2016.1143883 . .

TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2015
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2202
AB  - A complex flow pattern occurring in a circular conduit bend with supercritical flow has been studied. The main objective was to obtain reliable criteria for prediction of the onset of helical and choking flow, in order to facilitate the design of bottom outlets, tunnel spillways and drainage collectors with bends. A series of scale model experiments provided data for developing empirical relationships describing the effects of the bend curvature, bend deflection angle and approach flow conditions (relative flow depth and Froude number) on the inception of helical and choking flow. Expressions for the energy bend loss coefficient were also proposed. The bend curvature and approach flow conditions proved to have a major influence on the onset of helical flow, while the deflection angle becomes an important parameter for angles less than 45 degrees. Bend curvature and deflection angle have commensurable influence on the onset of choking flow.
PB  - Taylor & Francis Ltd, Abingdon
T2  - Journal of Hydraulic Research
T1  - Supercritical flow in circular conduit bends
EP  - 100
IS  - 1
SP  - 93
VL  - 53
DO  - 10.1080/00221686.2014.932856
ER  - 

@article{
author = "Kolarević, Milena and Savić, Ljubodrag and Kapor, Radomir and Mladenović, Nikola",
year = "2015",
abstract = "A complex flow pattern occurring in a circular conduit bend with supercritical flow has been studied. The main objective was to obtain reliable criteria for prediction of the onset of helical and choking flow, in order to facilitate the design of bottom outlets, tunnel spillways and drainage collectors with bends. A series of scale model experiments provided data for developing empirical relationships describing the effects of the bend curvature, bend deflection angle and approach flow conditions (relative flow depth and Froude number) on the inception of helical and choking flow. Expressions for the energy bend loss coefficient were also proposed. The bend curvature and approach flow conditions proved to have a major influence on the onset of helical flow, while the deflection angle becomes an important parameter for angles less than 45 degrees. Bend curvature and deflection angle have commensurable influence on the onset of choking flow.",
publisher = "Taylor & Francis Ltd, Abingdon",
journal = "Journal of Hydraulic Research",
title = "Supercritical flow in circular conduit bends",
pages = "100-93",
number = "1",
volume = "53",
doi = "10.1080/00221686.2014.932856"
}

Kolarević, M., Savić, L., Kapor, R.,& Mladenović, N.. (2015). Supercritical flow in circular conduit bends. in Journal of Hydraulic Research
Taylor & Francis Ltd, Abingdon., 53(1), 93-100.
https://doi.org/10.1080/00221686.2014.932856

Kolarević M, Savić L, Kapor R, Mladenović N. Supercritical flow in circular conduit bends. in Journal of Hydraulic Research. 2015;53(1):93-100.
doi:10.1080/00221686.2014.932856 .

Kolarević, Milena, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Supercritical flow in circular conduit bends" in Journal of Hydraulic Research, 53, no. 1 (2015):93-100,
https://doi.org/10.1080/00221686.2014.932856 . .

TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2054
AB  - U radu je analizirano složeno strujanje koje nastaje u krivini zatvorenog provodnika u burnom toku. Ispitivanja su urađena na hidrauličkom fizičkom modelu, ali i na numeričkom, formiranom u okviru programskog paketa Ansys (Fluent). Rezultati sa hidrauličkog modela su korišćeni za kalibraciju numeričkog, pa je u okviru rada prikazano poređenje rezultata dobijenih na pomenuta dva modela, sa komentarima i preporukama za njihovu primenu. Na osnovu izvršenih ispitivanja date su jednostavne zavisnosti kojima se opisuje uticaj veličine skretnog ugla i prilaznih uslova tečenja (dubina i Frudov broj uzvodno od krivine) na razmatrano tečenje.
AB  - In this paper a complex flow pattern occurring in a closed conduit bend with supercritical flow is analyzed. The research was done by a scale (physical hydraulic) model, and a numerical model developed in Ansys (Fluent) program surrounding. This article compares the results obtained by numerical and physical (scale) models, providing comments and recommendations for their application. Based on these results, simple empirical relationships were developed, describing the effects of the bend deflection angle and approach flow conditions (non dimensional depth and the Froude number upstream from the bend) on the considered flow.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Burno tečenje u krivini kružne cevi
T1  - Supercritical flow in circular pipe bends
EP  - 132
IS  - 2
SP  - 128
VL  - 42
DO  - 10.5937/fmet1402128K
ER  - 

@article{
author = "Kolarević, Milena and Savić, Ljubodrag and Kapor, Radomir and Mladenović, Nikola",
year = "2014",
abstract = "U radu je analizirano složeno strujanje koje nastaje u krivini zatvorenog provodnika u burnom toku. Ispitivanja su urađena na hidrauličkom fizičkom modelu, ali i na numeričkom, formiranom u okviru programskog paketa Ansys (Fluent). Rezultati sa hidrauličkog modela su korišćeni za kalibraciju numeričkog, pa je u okviru rada prikazano poređenje rezultata dobijenih na pomenuta dva modela, sa komentarima i preporukama za njihovu primenu. Na osnovu izvršenih ispitivanja date su jednostavne zavisnosti kojima se opisuje uticaj veličine skretnog ugla i prilaznih uslova tečenja (dubina i Frudov broj uzvodno od krivine) na razmatrano tečenje., In this paper a complex flow pattern occurring in a closed conduit bend with supercritical flow is analyzed. The research was done by a scale (physical hydraulic) model, and a numerical model developed in Ansys (Fluent) program surrounding. This article compares the results obtained by numerical and physical (scale) models, providing comments and recommendations for their application. Based on these results, simple empirical relationships were developed, describing the effects of the bend deflection angle and approach flow conditions (non dimensional depth and the Froude number upstream from the bend) on the considered flow.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Burno tečenje u krivini kružne cevi, Supercritical flow in circular pipe bends",
pages = "132-128",
number = "2",
volume = "42",
doi = "10.5937/fmet1402128K"
}

Kolarević, M., Savić, L., Kapor, R.,& Mladenović, N.. (2014). Burno tečenje u krivini kružne cevi. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 42(2), 128-132.
https://doi.org/10.5937/fmet1402128K

Kolarević M, Savić L, Kapor R, Mladenović N. Burno tečenje u krivini kružne cevi. in FME Transactions. 2014;42(2):128-132.
doi:10.5937/fmet1402128K .

Kolarević, Milena, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Burno tečenje u krivini kružne cevi" in FME Transactions, 42, no. 2 (2014):128-132,
https://doi.org/10.5937/fmet1402128K . .

TY  - JOUR
AU  - Zindović, Budo
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2014
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1973
AB  - Tema rada je modeliranje strujnog polja na stepenastom brzotoku brane Bogovina. Analiza je sprovedena na rezultatima dobijenih pomoću: fizičkog modela, empirijskih jednačina i numeričkog modela. Slaganja rezultata empirijskih jednačina i numeričkog modela su u prihvatljivim granicama, dok je primećeno njihovo značajno odstupanje od rezultata merenja na fizičkom modelu. Uzrok ovih razlika je proces samo-aeracije mlaza. Budući da je ovaj proces važan za ovaj vid strujanja, nepohodno je poboljšati postojeće empirijske zavisnosti i numeričke modele.
AB  - This paper deals with flow modelling of the stepped spillway for the Bogovina dam. The analysis was conducted using three approaches: scalemodelling, empirical equations and numerical modelling. An acceptable agreement was achieved between the empirical equations and the numerical model results, while both of them exhibit considerable differences when compared to scale-model. These discrepancies can be contributed to the difficulties in modelling the process of air-entrainment. Since air-entrainment is important for providing good estimates, existing empirical equations as well as numerical models require further improvements.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Strujanje u stepenastom brzotoku - poređenje rezultata fizičkog i numeričkog modela
T1  - Stepped spillway flow: Comparison of numerical and scale models
EP  - 223
IS  - 3
SP  - 218
VL  - 42
DO  - 10.5937/fmet1403218Z
ER  - 

@article{
author = "Zindović, Budo and Savić, Ljubodrag and Kapor, Radomir and Mladenović, Nikola",
year = "2014",
abstract = "Tema rada je modeliranje strujnog polja na stepenastom brzotoku brane Bogovina. Analiza je sprovedena na rezultatima dobijenih pomoću: fizičkog modela, empirijskih jednačina i numeričkog modela. Slaganja rezultata empirijskih jednačina i numeričkog modela su u prihvatljivim granicama, dok je primećeno njihovo značajno odstupanje od rezultata merenja na fizičkom modelu. Uzrok ovih razlika je proces samo-aeracije mlaza. Budući da je ovaj proces važan za ovaj vid strujanja, nepohodno je poboljšati postojeće empirijske zavisnosti i numeričke modele., This paper deals with flow modelling of the stepped spillway for the Bogovina dam. The analysis was conducted using three approaches: scalemodelling, empirical equations and numerical modelling. An acceptable agreement was achieved between the empirical equations and the numerical model results, while both of them exhibit considerable differences when compared to scale-model. These discrepancies can be contributed to the difficulties in modelling the process of air-entrainment. Since air-entrainment is important for providing good estimates, existing empirical equations as well as numerical models require further improvements.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Strujanje u stepenastom brzotoku - poređenje rezultata fizičkog i numeričkog modela, Stepped spillway flow: Comparison of numerical and scale models",
pages = "223-218",
number = "3",
volume = "42",
doi = "10.5937/fmet1403218Z"
}

Zindović, B., Savić, L., Kapor, R.,& Mladenović, N.. (2014). Strujanje u stepenastom brzotoku - poređenje rezultata fizičkog i numeričkog modela. in FME Transactions
Univerzitet u Beogradu - Mašinski fakultet, Beograd., 42(3), 218-223.
https://doi.org/10.5937/fmet1403218Z

Zindović B, Savić L, Kapor R, Mladenović N. Strujanje u stepenastom brzotoku - poređenje rezultata fizičkog i numeričkog modela. in FME Transactions. 2014;42(3):218-223.
doi:10.5937/fmet1403218Z .

Zindović, Budo, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Strujanje u stepenastom brzotoku - poređenje rezultata fizičkog i numeričkog modela" in FME Transactions, 42, no. 3 (2014):218-223,
https://doi.org/10.5937/fmet1403218Z . .

TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1626
AB  - Analizirano je složeno strujanje koje nastaje u krivini kružnog provodnika pri burnom toku. Ispitivanja su urađena na hidrauličkom fizičkom modelu, kao i na numeričkom modelu, zasnovanom na programskom paketu ANSYS (Fluent). Prikazani su rezultati dobijeni na pomenuta dva modela, sa komentarima i preporukama za njihovu primenu. Predložene su jednostavne zavisnosti kojima se opisuje uticaj zakrivljenosti, skretnog ugla i prilaznih uslova tečenja (dubina i Frudov broj uzvodno od krivine) na razmatrano tečenje.
AB  - Complex flow pattern occurring in a circular conduit bend with supercritical flow is analyzed. The research was done by a scale (physical hydraulic) model, and a numerical model developed in ANSYS (Fluent) surrounding. The results obtained by physical (scale) and numerical models are presented, with comments and recommendations for their application. Simple empirical relationships were developed, describing the effects of the bend curvature, bend deflection angle and approaching flow conditions (depth and Froude number upstream from the bend) on the considered flow.
PB  - Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd
T2  - Vodoprivreda
T1  - Burno tečenje u krivini provodnika kružnog poprečnog preseka
T1  - Supercritical flow in circular-conduit bends
EP  - 137
IS  - 1-3
SP  - 123
VL  - 45
UR  - https://hdl.handle.net/21.15107/rcub_machinery_1626
ER  - 

@article{
author = "Kolarević, Milena and Savić, Ljubodrag and Kapor, Radomir and Mladenović, Nikola",
year = "2013",
abstract = "Analizirano je složeno strujanje koje nastaje u krivini kružnog provodnika pri burnom toku. Ispitivanja su urađena na hidrauličkom fizičkom modelu, kao i na numeričkom modelu, zasnovanom na programskom paketu ANSYS (Fluent). Prikazani su rezultati dobijeni na pomenuta dva modela, sa komentarima i preporukama za njihovu primenu. Predložene su jednostavne zavisnosti kojima se opisuje uticaj zakrivljenosti, skretnog ugla i prilaznih uslova tečenja (dubina i Frudov broj uzvodno od krivine) na razmatrano tečenje., Complex flow pattern occurring in a circular conduit bend with supercritical flow is analyzed. The research was done by a scale (physical hydraulic) model, and a numerical model developed in ANSYS (Fluent) surrounding. The results obtained by physical (scale) and numerical models are presented, with comments and recommendations for their application. Simple empirical relationships were developed, describing the effects of the bend curvature, bend deflection angle and approaching flow conditions (depth and Froude number upstream from the bend) on the considered flow.",
publisher = "Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd",
journal = "Vodoprivreda",
title = "Burno tečenje u krivini provodnika kružnog poprečnog preseka, Supercritical flow in circular-conduit bends",
pages = "137-123",
number = "1-3",
volume = "45",
url = "https://hdl.handle.net/21.15107/rcub_machinery_1626"
}

Kolarević, M., Savić, L., Kapor, R.,& Mladenović, N.. (2013). Burno tečenje u krivini provodnika kružnog poprečnog preseka. in Vodoprivreda
Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd., 45(1-3), 123-137.
https://hdl.handle.net/21.15107/rcub_machinery_1626

Kolarević M, Savić L, Kapor R, Mladenović N. Burno tečenje u krivini provodnika kružnog poprečnog preseka. in Vodoprivreda. 2013;45(1-3):123-137.
https://hdl.handle.net/21.15107/rcub_machinery_1626 .

Kolarević, Milena, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Burno tečenje u krivini provodnika kružnog poprečnog preseka" in Vodoprivreda, 45, no. 1-3 (2013):123-137,
https://hdl.handle.net/21.15107/rcub_machinery_1626 .

TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2013
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/1641
AB  - U radu su analizirani gubici energije u krivini koji nastaju pri burnom tečenju u provodniku kružnog poprečnog preseka. Urađena su hidraulička modelska ispitivanja, na osnovu kojih su određeni koeficijenti gubitka energije. Predloženi su izrazi za koeficijent gubitka u zavisnosti od karakteristika krivine (skretnog ugla i zakrivljenosti). S obzirom da u literaturi ne postoje izrazi kojima se opisuje ovakav gubitak energije u krivini, predložene zavisnosti su upoređene sa izrazi a ko i se odnose na tečenje pod pritiskom. Na kraju rada su date preporuke i zaključci.
AB  - In this paper the energy loss in a circular conduit bend with supercritical flow is analyzed. Based on the test results obtained by a scale model, the energy-loss coefficient has been determined. Simple empirical relationships were developed, describing the effects of the bend curvature and bend deflection angle on the energy losses. Since no expressions for supercritical flow bend energy-loss coefficient exist, proposed empirical relationships have been compared with expressions relating to pressurized flow.
PB  - Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd
T2  - Vodoprivreda
T1  - Gubitak energije u krivini kružnog provodnika pri burnom tečenju
T1  - Energy loss in a circular-conduit bends with supercritical flow
EP  - 201
IS  - 4-6
SP  - 193
VL  - 45
UR  - https://hdl.handle.net/21.15107/rcub_grafar_494
ER  - 

@article{
author = "Kolarević, Milena and Savić, Ljubodrag and Kapor, Radomir and Mladenović, Nikola",
year = "2013",
abstract = "U radu su analizirani gubici energije u krivini koji nastaju pri burnom tečenju u provodniku kružnog poprečnog preseka. Urađena su hidraulička modelska ispitivanja, na osnovu kojih su određeni koeficijenti gubitka energije. Predloženi su izrazi za koeficijent gubitka u zavisnosti od karakteristika krivine (skretnog ugla i zakrivljenosti). S obzirom da u literaturi ne postoje izrazi kojima se opisuje ovakav gubitak energije u krivini, predložene zavisnosti su upoređene sa izrazi a ko i se odnose na tečenje pod pritiskom. Na kraju rada su date preporuke i zaključci., In this paper the energy loss in a circular conduit bend with supercritical flow is analyzed. Based on the test results obtained by a scale model, the energy-loss coefficient has been determined. Simple empirical relationships were developed, describing the effects of the bend curvature and bend deflection angle on the energy losses. Since no expressions for supercritical flow bend energy-loss coefficient exist, proposed empirical relationships have been compared with expressions relating to pressurized flow.",
publisher = "Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd",
journal = "Vodoprivreda",
title = "Gubitak energije u krivini kružnog provodnika pri burnom tečenju, Energy loss in a circular-conduit bends with supercritical flow",
pages = "201-193",
number = "4-6",
volume = "45",
url = "https://hdl.handle.net/21.15107/rcub_grafar_494"
}

Kolarević, M., Savić, L., Kapor, R.,& Mladenović, N.. (2013). Gubitak energije u krivini kružnog provodnika pri burnom tečenju. in Vodoprivreda
Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd., 45(4-6), 193-201.
https://hdl.handle.net/21.15107/rcub_grafar_494

Kolarević M, Savić L, Kapor R, Mladenović N. Gubitak energije u krivini kružnog provodnika pri burnom tečenju. in Vodoprivreda. 2013;45(4-6):193-201.
https://hdl.handle.net/21.15107/rcub_grafar_494 .

Kolarević, Milena, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Gubitak energije u krivini kružnog provodnika pri burnom tečenju" in Vodoprivreda, 45, no. 4-6 (2013):193-201,
https://hdl.handle.net/21.15107/rcub_grafar_494 .