ON THE TWO-DIMENSIONAL TURBULENT FLOW AND TRANSPORT PHENOMENA USING LARGE EDDY SIMULATION METHOD

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HEYDARINEZHAD GH.; ESKANDARISANI A.A.; ZOU ALFAGHARI A.

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Journal: Modares Mechanical Engineering Year:2010 | Volume:10 | Issue:2 Page(s): 79-87

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Title

ON THE TWO-DIMENSIONAL TURBULENT FLOW AND TRANSPORT PHENOMENA USING LARGE EDDY SIMULATION METHOD

Author(s)

HEYDARINEZHAD GH. | ESKANDARISANI A.A. | ZOU ALFAGHARI A. | Issue Writer Certificate

Keywords

PASSIVE SCALARQ3

TURBULENCEQ2

LARGE EDDIESQ3

FILTERINGQ3

NUMERICAL SIMULATIONQ2

TURBULENT FLOW MODELINGQ2

CAVITY FLOWQ3

BACKWARD FACING STEP FLOWQ3

Abstract

A PASSIVE SCALAR is a property that is affected by the flow field without affecting it. In this paper, first, the governing equations on the turbulent flows are solved and the property of a PASSIVE SCALAR in two dimensions is numerically studied. Having the values of the velocity components, the governing equation on transport of a PASSIVE SCALAR is solved. To compute the turbulent velocity field, the Large Eddy Simulation (LES) method using Smagorinsky subgrid scale is invoked. The flow in a cavity has been the basis to validate the accuracy of the generated computer code. To ensure the compatibility between the flow and the transport of PASSIVE SCALAR fields a similar LES approach is used. As a three-dimensional numerical solution for a turbulent flow fields needs a massive computational time and efforts, therefore a two-dimensional simulation used for a proper saving. Instead, to validate the numerical results, the range of the Reynolds number of the flow is kept within the range of the two-dimensional measurements. Comparison of the numerical results and the experimental measurements in two-dimension reveals the high accuracy of the results and compatibility between the flow and PASSIVE SCALAR fields. Ability of developed scheme to accurately handle transport of a PASSIVE SCALAR is promising to extend LES method into the transport of more species and hence to simulate reacting flows.

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