Large eddy simulation of turbulent channel flow using differential equation wall model

Dublin Core

Title

Large eddy simulation of turbulent channel flow using differential equation wall model

Description

A large eddy simulation (LES) of a plane turbulent channel flow is performed at a Reynolds number Re? = 590 based on the channel half width, ? and wall shear velocity, u? by approximating the near wall region using differential equation wall model (DEWM). The simulation is performed in a computational domain of 2?? x 2? x ??. The computational domain is discretized by staggered grid system with 32 x 30 x 32 grid points. In this domain the governing equations of LES are discretized spatially by second order finite difference formulation, and for temporal discretization the third order low-storage Runge-Kutta method is used. Essential turbulence statistics of the computed flow field based on this LES approach are calculated and compared with the available Direct Numerical Simulation (DNS) and LES data where no wall model was used. Comparing the results throughout the calculation domain we have found that the LES results based on DEWM show closer agreement with the DNS data, especially at the near wall region. That is, the LES approach based on DEWM can capture the effects of near wall structures more accurately. Flow structures in the computed flow field in the 3D turbulent channel have also been discussed and compared with LES data using no wall model.

Creator

Mallik, Muhammad Saiful Islam
Uddin, Md. Ashraf

Source

Journal of Naval Architecture and Marine Engineering; Vol. 15 No. 2 (2018); 75-89
2070-8998
1813-8535

Publisher

Association of Naval Architects and Marine Engineers

Date

2018-12-25

Rights

Copyright (c) 2018 Journal of Naval Architecture and Marine Engineering

Relation

Format

application/pdf

Language

eng

Type

info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

Identifier

Citation

Muhammad Mallik Saiful Islam and Md Uddin. Ashraf, Large eddy simulation of turbulent channel flow using differential equation wall model, Association of Naval Architects and Marine Engineers, 2018, accessed November 8, 2024, https://igi.indrastra.com/items/show/3292

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