A new variational multiscale formulation for stratified incompressible turbulent flows

J. Yan; A. Korobenko; A. E. Tejada-Martínez; R. Golshan; Y. Bazilevs

doi:10.1016/j.compfluid.2016.12.004

A new variational multiscale formulation for stratified incompressible turbulent flows

J. Yan, A. Korobenko, A. E. Tejada-Martínez, R. Golshan, Y. Bazilevs

Research output: Contribution to journal › Article › peer-review

Abstract

For geophysical and environmental flows in the high-Reynolds-number regime, stable density stratification strongly affects the turbulent fluid motions. While turbulent flows, due to the presence of a cascade of spatial and temporal scales, present several challenges to accurate numerical approximation, density stratification in these flows exacerbates the situation further by suppressing vertical velocity fluctuations thereby enhancing the anisotropy of the turbulence. In this paper, based on the framework of residual-based variational multiscale (RBVMS) methods, we design a new numerical formulation for incompressible stratified flows that introduces coupling between the velocity fine scales and densityequation residual, and gives improved numerical performance as evidenced by the results of two challenging turbulent-flow simulations.

Original language	English (US)
Pages (from-to)	150-156
Number of pages	7
Journal	Computers and Fluids
Volume	158
DOIs	https://doi.org/10.1016/j.compfluid.2016.12.004
State	Published - Nov 24 2017
Externally published	Yes

Keywords

Density-stratified flows
FEM
IGA
RBVMS
Self-propelled wake
Turbulent channel flow

ASJC Scopus subject areas

General Computer Science
General Engineering

Online availability

10.1016/j.compfluid.2016.12.004

Library availability

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Cite this

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title = "A new variational multiscale formulation for stratified incompressible turbulent flows",

abstract = "For geophysical and environmental flows in the high-Reynolds-number regime, stable density stratification strongly affects the turbulent fluid motions. While turbulent flows, due to the presence of a cascade of spatial and temporal scales, present several challenges to accurate numerical approximation, density stratification in these flows exacerbates the situation further by suppressing vertical velocity fluctuations thereby enhancing the anisotropy of the turbulence. In this paper, based on the framework of residual-based variational multiscale (RBVMS) methods, we design a new numerical formulation for incompressible stratified flows that introduces coupling between the velocity fine scales and densityequation residual, and gives improved numerical performance as evidenced by the results of two challenging turbulent-flow simulations.",

keywords = "Density-stratified flows, FEM, IGA, RBVMS, Self-propelled wake, Turbulent channel flow",

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doi = "10.1016/j.compfluid.2016.12.004",

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T1 - A new variational multiscale formulation for stratified incompressible turbulent flows

AU - Yan, J.

AU - Korobenko, A.

AU - Tejada-Martínez, A. E.

AU - Golshan, R.

AU - Bazilevs, Y.

PY - 2017/11/24

Y1 - 2017/11/24

N2 - For geophysical and environmental flows in the high-Reynolds-number regime, stable density stratification strongly affects the turbulent fluid motions. While turbulent flows, due to the presence of a cascade of spatial and temporal scales, present several challenges to accurate numerical approximation, density stratification in these flows exacerbates the situation further by suppressing vertical velocity fluctuations thereby enhancing the anisotropy of the turbulence. In this paper, based on the framework of residual-based variational multiscale (RBVMS) methods, we design a new numerical formulation for incompressible stratified flows that introduces coupling between the velocity fine scales and densityequation residual, and gives improved numerical performance as evidenced by the results of two challenging turbulent-flow simulations.

AB - For geophysical and environmental flows in the high-Reynolds-number regime, stable density stratification strongly affects the turbulent fluid motions. While turbulent flows, due to the presence of a cascade of spatial and temporal scales, present several challenges to accurate numerical approximation, density stratification in these flows exacerbates the situation further by suppressing vertical velocity fluctuations thereby enhancing the anisotropy of the turbulence. In this paper, based on the framework of residual-based variational multiscale (RBVMS) methods, we design a new numerical formulation for incompressible stratified flows that introduces coupling between the velocity fine scales and densityequation residual, and gives improved numerical performance as evidenced by the results of two challenging turbulent-flow simulations.

KW - Density-stratified flows

KW - FEM

KW - IGA

KW - RBVMS

KW - Self-propelled wake

KW - Turbulent channel flow

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A new variational multiscale formulation for stratified incompressible turbulent flows

Abstract

Keywords

ASJC Scopus subject areas

Online availability

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