Direct numerical simulations of shocklet-containing turbulent channel counter-flows
Abstract
Counter-flow or counter-current configurations can maintain high turbulence intensities and exhibit a significant level of mixing. We have previously introduced a wall-bounded counter-flow turbulent channel configuration (Physical Review Fluids, 6(9), p.094603.) as an efficient framework to study compressibility effects on turbulence. Here, we extend our previous direct numerical simulation study to a relatively higher Mach number (M=0.7) to investigate strong compressibility effects (also by reducing the Prandtl number from Pr=0.7 to 0.2), and the formation and evolution of unsteady shocklet structures. It is found that the configuration is able to produce highly turbulent flows with embedded shocklets and significant asymmetry in probability density functions of dilatation. A peak turbulent Mach number close to unity is obtained, for which the contribution of the dilatational dissipation to total dissipation is nevertheless found to be limited to 6%.
Keywords
Cite
@article{arxiv.2205.02552,
title = {Direct numerical simulations of shocklet-containing turbulent channel counter-flows},
author = {Arash Hamzehloo and David J. Lusher and Sylvain Laizet and Neil D. Sandham},
journal= {arXiv preprint arXiv:2205.02552},
year = {2022}
}
Comments
Accepted for oral presentation at the 12th International Symposium on Turbulence and Shear Flow Phenomena (TSFP12)