A POD-Based Variational Multiscale Method for Large Eddy Simulation of Turbulent Channel Flows

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A POD-Based Variational Multiscale Method for Large Eddy Simulation of Turbulent Channel Flows

Journal Article (2016)

Author(s)

L. Chen (Hunan University, TU Delft - Aerospace Engineering)

Xu Qu Hu (Hunan University)

Research Group

Aerodynamics

Proper orthogonal decomposition Turbulent channel flow Variational multiscale method

DOI related publication

https://doi.org/10.1142/S0219876217500499 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:9b9e3637-45ef-4806-97f0-ab0b5d07f447

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Publication Year

2016

Language

English

Research Group

Aerodynamics

Issue number

5

Volume number

14

Downloads counter

83

Abstract

A POD-based variational multiscale method (VMM) for large eddy simulation (LES) of turbulent channel flows is proposed. The incompressible Navier–Stokes equations are solved using a residual-based VMM technique, and the residual-based model coefficient is adopted from Taylor et al. [1998] “Finite element modeling of blood flow in arteries,” Comput. Methods in Appl. Mech. Eng. 158(1–2), 155–196. A generalized-(Formula presented.) method is applied for the temporal integration. Numerical results show that four or higher wall-normal modes need to be applied for reproducing most of the turbulent characteristics. Results of large vortex structures and the low velocity streaks prove that the turbulent channel flows are well estimated by the proposed approach. The statistical analysis of the turbulent velocities confirms its reliability in turbulent channel flows.