NUMERICAL MODELLING OF NON-ISOTROPIC STRATIFIED FLOWS USING AN EXPLICIT ALGEBRAIC REYNOLDS STRESS TURBULENCE MODEL (EARSM)

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AMIRI MOHAMMAD REZA; HEJAZI KOUROSH

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Journal: JOURNAL OF MARINE ENGINEERING Year:2015 | Volume:11 | Issue:21 Page(s): 13-27

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Title

NUMERICAL MODELLING OF NON-ISOTROPIC STRATIFIED FLOWS USING AN EXPLICIT ALGEBRAIC REYNOLDS STRESS TURBULENCE MODEL (EARSM)

Author(s)

AMIRI MOHAMMAD REZA | HEJAZI KOUROSH | Issue Writer Certificate

Keywords

TURBULENCE MODELLINGQ2

EXPLICIT ALGEBRAIC REYNOLDS STRESS MODELQ2

SALINE AND DENSE STRATIFIED FLOWSQ2

BUOYANCY FORCESQ2

NON-ISOTROPIC STRESSESQ2

Abstract

Flows of natural hydro-environments are usually turbulent and mostly stratified, like the flows in lakes, reservoirs, estuaries and atmosphere to name a few. In stratified flows due to the BUOYANCY FORCES, the turbulent stresses are usually non-isotropic. Therefore the accuracy of the numerical simulations for such flows is highly dependent on the turbulence model and the implementation of NON-ISOTROPIC STRESSES. The hydrodynamic model deployed herein is the 2DV WISE (Width Integrated Stratified Environments) numerical model. In this paper an EXPLICIT ALGEBRAIC REYNOLDS STRESS MODEL together with an explicit algebraic scalar flux model have been developed and implemented in the original hydrodynamic model. To validate the EARSM turbulence model, lock release tests have been simulated for SALINE AND DENSE STRATIFIED FLOWS. The predicted values of the evolution and the front head position of the stratified flow, and the velocity profiles simulated by EARSM model have been compared against the measured values reported in the literature and the predicted results of the buoyant k-e model originally included in the hydrodynamic model. The comparisons indicated good performance of the EARSM turbulence model and showed its superiority compared to the k-e turbulence model in these regions.

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APA: Copy

AMIRI, MOHAMMAD REZA, & HEJAZI, KOUROSH. (2015). NUMERICAL MODELLING OF NON-ISOTROPIC STRATIFIED FLOWS USING AN EXPLICIT ALGEBRAIC REYNOLDS STRESS TURBULENCE MODEL (EARSM). JOURNAL OF MARINE ENGINEERING, 11(21), 13-27. SID. https://sid.ir/paper/60808/en

Vancouver: Copy

AMIRI MOHAMMAD REZA, HEJAZI KOUROSH. NUMERICAL MODELLING OF NON-ISOTROPIC STRATIFIED FLOWS USING AN EXPLICIT ALGEBRAIC REYNOLDS STRESS TURBULENCE MODEL (EARSM). JOURNAL OF MARINE ENGINEERING[Internet]. 2015;11(21):13-27. Available from: https://sid.ir/paper/60808/en

IEEE: Copy

MOHAMMAD REZA AMIRI, and KOUROSH HEJAZI, “NUMERICAL MODELLING OF NON-ISOTROPIC STRATIFIED FLOWS USING AN EXPLICIT ALGEBRAIC REYNOLDS STRESS TURBULENCE MODEL (EARSM),” JOURNAL OF MARINE ENGINEERING, vol. 11, no. 21, pp. 13–27, 2015, [Online]. Available: https://sid.ir/paper/60808/en

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