TY  - JOUR
AU  - Rosić, Nikola
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Đorđević, Dejana
AU  - Kapor, Radomir
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/836
AB  - The capability of the smoothed-particle hydrodynamics (SPH) method to model supercritical flow in circular pipe bends is considered. The standard SPH method, which makes use of dynamic boundary particles (DBP), is supplemented with the original algorithm for the treatment of open boundaries. The method is assessed through a comparison with measured free-surface profiles in a pipe bend, and already proposed regression curves for estimation of the flow-type in a pipe bend. The sensitivity of the model to different parameters is also evaluated. It is shown that an adequate choice of the artificial viscosity coefficient and the initial particle spacing can lead to correct presentation of the flow-type in a bend. Due to easiness of its implementation, the SPH method can be efficiently used in the design of circular conduits with supercritical flow in a bend, such as tunnel spillways, and bottom outlets of dams, or storm sewers.
PB  - China Ocean Press
T2  - Journal of Hydrodynamics
T1  - Numerical modelling of supercritical flow in circular conduit bends using SPH method
EP  - 352
IS  - 2
SP  - 344
VL  - 29
DO  - 10.1016/S1001-6058(16)60744-8
ER  - 

@article{
author = "Rosić, Nikola and Kolarević, Milena and Savić, Ljubodrag and Đorđević, Dejana and Kapor, Radomir",
year = "2017",
abstract = "The capability of the smoothed-particle hydrodynamics (SPH) method to model supercritical flow in circular pipe bends is considered. The standard SPH method, which makes use of dynamic boundary particles (DBP), is supplemented with the original algorithm for the treatment of open boundaries. The method is assessed through a comparison with measured free-surface profiles in a pipe bend, and already proposed regression curves for estimation of the flow-type in a pipe bend. The sensitivity of the model to different parameters is also evaluated. It is shown that an adequate choice of the artificial viscosity coefficient and the initial particle spacing can lead to correct presentation of the flow-type in a bend. Due to easiness of its implementation, the SPH method can be efficiently used in the design of circular conduits with supercritical flow in a bend, such as tunnel spillways, and bottom outlets of dams, or storm sewers.",
publisher = "China Ocean Press",
journal = "Journal of Hydrodynamics",
title = "Numerical modelling of supercritical flow in circular conduit bends using SPH method",
pages = "352-344",
number = "2",
volume = "29",
doi = "10.1016/S1001-6058(16)60744-8"
}

Rosić, N., Kolarević, M., Savić, L., Đorđević, D.,& Kapor, R.. (2017). Numerical modelling of supercritical flow in circular conduit bends using SPH method. in Journal of Hydrodynamics
China Ocean Press., 29(2), 344-352.
https://doi.org/10.1016/S1001-6058(16)60744-8

Rosić N, Kolarević M, Savić L, Đorđević D, Kapor R. Numerical modelling of supercritical flow in circular conduit bends using SPH method. in Journal of Hydrodynamics. 2017;29(2):344-352.
doi:10.1016/S1001-6058(16)60744-8 .

Rosić, Nikola, Kolarević, Milena, Savić, Ljubodrag, Đorđević, Dejana, Kapor, Radomir, "Numerical modelling of supercritical flow in circular conduit bends using SPH method" in Journal of Hydrodynamics, 29, no. 2 (2017):344-352,
https://doi.org/10.1016/S1001-6058(16)60744-8 . .

TY  - JOUR
AU  - Rosić, Nikola
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Đorđević, Dejana
AU  - Kapor, Radomir
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2335
AB  - The capability of the smoothed-particle hydrodynamics (SPH) method to model supercritical flow in circular pipe bends is considered.  The  standard  SPH  method,  which  makes  use  of  dynamic  boundary  particles  (DBP),  is  supplemented  with  the  original  algorithm for the treatment of open boundaries. The method is assessed through a comparison with measured free-surface profiles in a pipe bend, and already proposed regression curves for estimation of the flow-type in a pipe bend. The sensitivity of the model to different parameters is also evaluated. It is shown that an adequate choice of the artificial viscosity coefficient and the initial particle spacing  can  lead  to  correct  presentation  of  the  flow-type  in  a  bend.  Due  to  easiness  of  its  implementation,  the  SPH  method  can  be  efficiently used in the design of circular conduits with supercritical flow in a bend, such as tunnel spillways, and bottom outlets of dams, or storm sewers.
PB  - China Ocean Press
T2  - Journal of Hydrodynamics
T1  - Numerical modelling of supercritical flow in circular conduit bends using SPH method
EP  - 352
IS  - 2
SP  - 344
VL  - 29
DO  - 10.1016/S1001-6058(16)60744-8
ER  - 

@article{
author = "Rosić, Nikola and Kolarević, Milena and Savić, Ljubodrag and Đorđević, Dejana and Kapor, Radomir",
year = "2017",
abstract = "The capability of the smoothed-particle hydrodynamics (SPH) method to model supercritical flow in circular pipe bends is considered.  The  standard  SPH  method,  which  makes  use  of  dynamic  boundary  particles  (DBP),  is  supplemented  with  the  original  algorithm for the treatment of open boundaries. The method is assessed through a comparison with measured free-surface profiles in a pipe bend, and already proposed regression curves for estimation of the flow-type in a pipe bend. The sensitivity of the model to different parameters is also evaluated. It is shown that an adequate choice of the artificial viscosity coefficient and the initial particle spacing  can  lead  to  correct  presentation  of  the  flow-type  in  a  bend.  Due  to  easiness  of  its  implementation,  the  SPH  method  can  be  efficiently used in the design of circular conduits with supercritical flow in a bend, such as tunnel spillways, and bottom outlets of dams, or storm sewers.",
publisher = "China Ocean Press",
journal = "Journal of Hydrodynamics",
title = "Numerical modelling of supercritical flow in circular conduit bends using SPH method",
pages = "352-344",
number = "2",
volume = "29",
doi = "10.1016/S1001-6058(16)60744-8"
}

Rosić, N., Kolarević, M., Savić, L., Đorđević, D.,& Kapor, R.. (2017). Numerical modelling of supercritical flow in circular conduit bends using SPH method. in Journal of Hydrodynamics
China Ocean Press., 29(2), 344-352.
https://doi.org/10.1016/S1001-6058(16)60744-8

Rosić N, Kolarević M, Savić L, Đorđević D, Kapor R. Numerical modelling of supercritical flow in circular conduit bends using SPH method. in Journal of Hydrodynamics. 2017;29(2):344-352.
doi:10.1016/S1001-6058(16)60744-8 .

Rosić, Nikola, Kolarević, Milena, Savić, Ljubodrag, Đorđević, Dejana, Kapor, Radomir, "Numerical modelling of supercritical flow in circular conduit bends using SPH method" in Journal of Hydrodynamics, 29, no. 2 (2017):344-352,
https://doi.org/10.1016/S1001-6058(16)60744-8 . .

TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2015
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/696
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 and Francis Ltd.
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 and Francis Ltd.",
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 and Francis Ltd.., 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://grafar.grf.bg.ac.rs/handle/123456789/621
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.
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.
PB  - Univerzitet u Beogradu - Mašinski fakultet, Beograd
T2  - FME Transactions
T1  - Supercritical flow in circular pipe bends
T1  - Burno tečenje u krivini kružne cevi
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 = "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., 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.",
publisher = "Univerzitet u Beogradu - Mašinski fakultet, Beograd",
journal = "FME Transactions",
title = "Supercritical flow in circular pipe bends, Burno tečenje u krivini kružne cevi",
pages = "132-128",
number = "2",
volume = "42",
doi = "10.5937/fmet1402128K"
}

Kolarević, M., Savić, L., Kapor, R.,& Mladenović, N.. (2014). Supercritical flow in circular pipe bends. 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. Supercritical flow in circular pipe bends. in FME Transactions. 2014;42(2):128-132.
doi:10.5937/fmet1402128K .

Kolarević, Milena, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Supercritical flow in circular pipe bends" in FME Transactions, 42, no. 2 (2014):128-132,
https://doi.org/10.5937/fmet1402128K . .

TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2013
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/504
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.
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.
PB  - Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd
T2  - Vodoprivreda
T1  - Supercritical flow in circular-conduit bends
T1  - Burno tečenje u krivini provodnika kružnog poprečnog preseka
EP  - 137
IS  - 1-3
SP  - 123
VL  - 45
UR  - https://hdl.handle.net/21.15107/rcub_grafar_504
ER  - 

@article{
author = "Kolarević, Milena and Savić, Ljubodrag and Kapor, Radomir and Mladenović, Nikola",
year = "2013",
abstract = "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., 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.",
publisher = "Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd",
journal = "Vodoprivreda",
title = "Supercritical flow in circular-conduit bends, Burno tečenje u krivini provodnika kružnog poprečnog preseka",
pages = "137-123",
number = "1-3",
volume = "45",
url = "https://hdl.handle.net/21.15107/rcub_grafar_504"
}

Kolarević, M., Savić, L., Kapor, R.,& Mladenović, N.. (2013). Supercritical flow in circular-conduit bends. in Vodoprivreda
Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd., 45(1-3), 123-137.
https://hdl.handle.net/21.15107/rcub_grafar_504

Kolarević M, Savić L, Kapor R, Mladenović N. Supercritical flow in circular-conduit bends. in Vodoprivreda. 2013;45(1-3):123-137.
https://hdl.handle.net/21.15107/rcub_grafar_504 .

Kolarević, Milena, Savić, Ljubodrag, Kapor, Radomir, Mladenović, Nikola, "Supercritical flow in circular-conduit bends" in Vodoprivreda, 45, no. 1-3 (2013):123-137,
https://hdl.handle.net/21.15107/rcub_grafar_504 .

TY  - JOUR
AU  - Kolarević, Milena
AU  - Savić, Ljubodrag
AU  - Kapor, Radomir
AU  - Mladenović, Nikola
PY  - 2013
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/494
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.
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.
PB  - Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd
T2  - Vodoprivreda
T1  - Energy loss in a circular-conduit bends with supercritical flow
T1  - Gubitak energije u krivini kružnog provodnika pri burnom tečenju
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 = "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., 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.",
publisher = "Jugoslovensko društvo za odvodnjavanje i navodnjavanje, Beograd",
journal = "Vodoprivreda",
title = "Energy loss in a circular-conduit bends with supercritical flow, Gubitak energije u krivini kružnog provodnika pri burnom tečenju",
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). Energy loss in a circular-conduit bends with supercritical flow. 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. Energy loss in a circular-conduit bends with supercritical flow. 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, "Energy loss in a circular-conduit bends with supercritical flow" in Vodoprivreda, 45, no. 4-6 (2013):193-201,
https://hdl.handle.net/21.15107/rcub_grafar_494 .