Spectral-element simulations of variable-density turbulent flow in a plane channel

Vladimir Ryzhenkov; Vladislav Ivashchenko; Ricardo Vinuesa; Rustam Mullyadzhanov

doi:10.1051/epjconf/201715900041

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Proceedings

Open Access

EPJ Web of Conferences 159, 00041 (2017)
https://doi.org/10.1051/epjconf/201715900041

Spectral-element simulations of variable-density turbulent flow in a plane channel

Vladimir Ryzhenkov¹^,2, Vladislav Ivashchenko¹^,2, Ricardo Vinuesa³ and Rustam Mullyadzhanov¹^,2

¹ Institute of Thermophysics SB RAS, 630090, Novosibirsk, Russia
² Novosibirsk State University, 630090, Novosibirsk, Russia
³ Linne FLOW Centre, KTH Mechanics and Swedish e-Science Research Centre, SE-100 44, Stockholm, Sweden

Published online: 25 October 2017

Abstract

We perform Large-eddy simulations (LES) of the turbulent flow in a channel with isothermal heated walls with the temperature ratio equal to 2. The variable properties of the fluid are accounted for by using the low Mach number approximation. The Reynolds number based on the bulk velocity, half-width of the channel, density and dynamic viscosity near the cold wall is 6800. We study the effect of spatial resolution on the accuracy of Large-eddy simulations with dynamic Smagorinsky model. The very good agreement of LES results is shown even for the coarse meshes which is attributed to the high accuracy of the spectral method.

© The authors, published by EDP Sciences, 2017

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).