MIXED LARGE- EDDY SIMULATION MODEL FOR TURBULENT FLOWS ACROSS TUBE BUNDLES USING PARALLEL COUPLED MULTIBLOK NS SOLVER

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TALEBI M.; SHIRANI E.; ASHARAFIZADEH M.

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Journal: ESTEGHLAL Year:2006 | Volume:25 | Issue:2 Page(s): 131-150

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Title

MIXED LARGE- EDDY SIMULATION MODEL FOR TURBULENT FLOWS ACROSS TUBE BUNDLES USING PARALLEL COUPLED MULTIBLOK NS SOLVER

Author(s)

TALEBI M. | SHIRANI E. | ASHARAFIZADEH M. | Issue Writer Certificate

Keywords

TURBULENT FLOWQ2

LARGE EDDY SIMULATIONQ3

TUBE BUNDLEQ3

PARALLEL PROGRAMMINGQ3

MULTIBLOK GRIDEQ3

Abstract

In this study, TURBULENT FLOW around a TUBE BUNDLE in non-orthogonal grid is simulation (LES) technique and parallelization of fully coupled navier-stokes (NS) equation. To model the small eddies, the smagorinsky and a mixed model was used. This model represents the effect of dissipation and the grid-scale and subgrid-scale interactions. The fully coupled NS equations with the multiblock method were parallelize. Parallelization of the computer code was accomplished by splitting the calculation domain into several subdomains and using different processors in such a way that the computational work was equally distributed among processors. The discretized governing equation are second order in time and in space and the pressure is calculated by momentum interpolation method (MIM) to prevent the checerbord problem the results are obtained for the TURBULENT FLOW over five parallel tube rows. The computational efficiency, flow patterns, and flow properties are also determined. The results showed high parallelization efficiency and high speed up for the computer code. The flow characteristics were determined and compared with experimental results which showed good agreement. Also, the results showed that the mixed model is better than the smagorinsky model for evolution of flow characteristics and lift and drag forces on tubes.

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APA: Copy

TALEBI, M., SHIRANI, E., & ASHARAFIZADEH, M.. (2006). MIXED LARGE- EDDY SIMULATION MODEL FOR TURBULENT FLOWS ACROSS TUBE BUNDLES USING PARALLEL COUPLED MULTIBLOK NS SOLVER. ESTEGHLAL, 25(2), 131-150. SID. https://sid.ir/paper/6041/en

Vancouver: Copy

TALEBI M., SHIRANI E., ASHARAFIZADEH M.. MIXED LARGE- EDDY SIMULATION MODEL FOR TURBULENT FLOWS ACROSS TUBE BUNDLES USING PARALLEL COUPLED MULTIBLOK NS SOLVER. ESTEGHLAL[Internet]. 2006;25(2):131-150. Available from: https://sid.ir/paper/6041/en

IEEE: Copy

M. TALEBI, E. SHIRANI, and M. ASHARAFIZADEH, “MIXED LARGE- EDDY SIMULATION MODEL FOR TURBULENT FLOWS ACROSS TUBE BUNDLES USING PARALLEL COUPLED MULTIBLOK NS SOLVER,” ESTEGHLAL, vol. 25, no. 2, pp. 131–150, 2006, [Online]. Available: https://sid.ir/paper/6041/en

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