Effect of turbulence models on the submerged hydraulic jump simulation

Autor:	Mitra Javan, Y. Shekari, Afshin Eghbalzadeh
Rok vydání:	2015
Předmět:	K-epsilon turbulence model Turbulence Mechanical Engineering K-omega turbulence model Mechanics Condensed Matter Physics Physics::Fluid Dynamics Fully developed Closure (computer programming) Mechanics of Materials Free surface Volume of fluid method Hydraulic jump Mathematics
Zdroj:	Journal of Applied Mechanics and Technical Physics. 56:454-463
ISSN:	1573-8620 0021-8944
DOI:	10.1134/s0021894415030153
Popis:	This study presents a numerical investigation and prediction of the flow field in threedimensional submerged hydraulic jumps. The volume of fluid (VOF) method is used to simulate the free surface. The turbulent structure is simulated by using different turbulence models, such as the standard k–e model, RNG k–e model, realizable k–e model, and Reynolds-stress model (RSM) closure schemes. The capabilities of the turbulence models are investigated with the standard wall functions and enhanced wall treatment methods. A comparison between the numerical and experimental results shows that the numerical model is adequate for predicting the flow pattern and free surface of submerged hydraulic jumps. The RNG k–e turbulence model with the enhanced wall treatment method ensures the highest accuracy in the water surface simulation. Near the channel bed of a fully developed region, the RSM model with the enhanced wall treatment method shows better agreement with the experimental longitudinal velocity than the other turbulence models. The standard k–e model predicts the longitudinal velocity more accurately than the RNG and realizable k–e models.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e470e2bc660af32433f0327dad740ad3 https://doi.org/10.1134/s0021894415030153 Zobrazit plný text záznamu Plný text ve formátu PDF