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 23, 2024, https://igi.indrastra.com/items/show/3292