On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models
Апстракт
This paper presents research regarding the influence of turbulent kinetic energy (TKE) level on accuracy of Reynolds averaged Navier-Stokes (RANS) based turbulence models. A theoretical analysis of influence TKE level on accuracy of the RANS turbulence models has been performed according to the Boussinesq hypothesis definition. After that, this theoretical analysis has been investigated by comparison of numerically and experimentally obtained results on the test case of a steady-state incompressible swirl-free flow in a straight conical diffuser named Azad diffuser. Numerical calculations have been performed using the OpenFOAM CFD software and first and second-order closure turbulence models. TKE level, velocity profiles and Reynolds stresses have been calculated downstream in four different cross sections of the diffuser. Certain conclusions about modeling turbulent flows by k - epsilon and LRR turbulence models have been made by comparing the velocity profiles, TKE distribution and R...eynolds stresses on the selected cross sections.
Кључне речи:
turbulent kinetic energy / RANS / OpenFOAM / diffuser / CFDИзвор:
Theoretical and Applied Mechanics, 2018, 45, 2, 139-149Издавач:
- Srpsko društvo za mehaniku, Beograd
Финансирање / пројекти:
- Развој модела мале хидроелектране за изоловано напајање рибњака, и микромреже са различитим обновљивим изворима енергије (RS-MESTD-Technological Development (TD or TR)-33046)
- Примена савремених мерних и прорачунских техника за изучавање струјних параметара вентилационих система на моделу енергетски изузетно ефикасног (пасивног) објекта (RS-MESTD-Technological Development (TD or TR)-35046)
DOI: 10.2298/TAM171201009N
ISSN: 1450-5584
WoS: 000455467700002
Scopus: 2-s2.0-85063053989
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Novković, Đorđe AU - Burazer, Jela M. AU - Ćoćić, Aleksandar AU - Lečić, Milan PY - 2018 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2849 AB - This paper presents research regarding the influence of turbulent kinetic energy (TKE) level on accuracy of Reynolds averaged Navier-Stokes (RANS) based turbulence models. A theoretical analysis of influence TKE level on accuracy of the RANS turbulence models has been performed according to the Boussinesq hypothesis definition. After that, this theoretical analysis has been investigated by comparison of numerically and experimentally obtained results on the test case of a steady-state incompressible swirl-free flow in a straight conical diffuser named Azad diffuser. Numerical calculations have been performed using the OpenFOAM CFD software and first and second-order closure turbulence models. TKE level, velocity profiles and Reynolds stresses have been calculated downstream in four different cross sections of the diffuser. Certain conclusions about modeling turbulent flows by k - epsilon and LRR turbulence models have been made by comparing the velocity profiles, TKE distribution and Reynolds stresses on the selected cross sections. PB - Srpsko društvo za mehaniku, Beograd T2 - Theoretical and Applied Mechanics T1 - On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models EP - 149 IS - 2 SP - 139 VL - 45 DO - 10.2298/TAM171201009N ER -
@article{ author = "Novković, Đorđe and Burazer, Jela M. and Ćoćić, Aleksandar and Lečić, Milan", year = "2018", abstract = "This paper presents research regarding the influence of turbulent kinetic energy (TKE) level on accuracy of Reynolds averaged Navier-Stokes (RANS) based turbulence models. A theoretical analysis of influence TKE level on accuracy of the RANS turbulence models has been performed according to the Boussinesq hypothesis definition. After that, this theoretical analysis has been investigated by comparison of numerically and experimentally obtained results on the test case of a steady-state incompressible swirl-free flow in a straight conical diffuser named Azad diffuser. Numerical calculations have been performed using the OpenFOAM CFD software and first and second-order closure turbulence models. TKE level, velocity profiles and Reynolds stresses have been calculated downstream in four different cross sections of the diffuser. Certain conclusions about modeling turbulent flows by k - epsilon and LRR turbulence models have been made by comparing the velocity profiles, TKE distribution and Reynolds stresses on the selected cross sections.", publisher = "Srpsko društvo za mehaniku, Beograd", journal = "Theoretical and Applied Mechanics", title = "On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models", pages = "149-139", number = "2", volume = "45", doi = "10.2298/TAM171201009N" }
Novković, Đ., Burazer, J. M., Ćoćić, A.,& Lečić, M.. (2018). On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models. in Theoretical and Applied Mechanics Srpsko društvo za mehaniku, Beograd., 45(2), 139-149. https://doi.org/10.2298/TAM171201009N
Novković Đ, Burazer JM, Ćoćić A, Lečić M. On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models. in Theoretical and Applied Mechanics. 2018;45(2):139-149. doi:10.2298/TAM171201009N .
Novković, Đorđe , Burazer, Jela M., Ćoćić, Aleksandar, Lečić, Milan, "On the influence of turbulent kinetic energy level on accuracy of k - epsilon and lrr turbulence models" in Theoretical and Applied Mechanics, 45, no. 2 (2018):139-149, https://doi.org/10.2298/TAM171201009N . .