Performance of very‐high‐order upwind schemes for DNS of compressible wall‐turbulence

Abstract

AbstractThe purpose of the present paper is to evaluate very‐high‐order upwind schemes for the direct numerical simulation (DNS) of compressible wall‐turbulence. We study upwind‐biased (UW) and weighted essentially nonoscillatory (WENO) schemes of increasingly higher order‐of‐accuracy (J. Comp. Phys. 2000; 160:405–452), extended up to WENO17 (AIAA Paper 2009‐1612, 2009). Analysis of the advection–diffusion equation, both as Δx→0 (consistency), and for fixed finite cell‐Reynolds‐number ReΔx (grid‐resolution), indicates that the very‐high‐order upwind schemes have satisfactory resolution in terms of points‐per‐wavelength (PPW). Computational results for compressible channel flow (Re∈[180, 230]; M̄CL∈[0.35, 1.5]) are examined to assess the influence of the spatial order of accuracy and the computational grid‐resolution on predicted turbulence statistics, by comparison with existing compressible and incompressible DNS databases. Despite the use of baseline O(Δt2) time‐integration and O(Δx2) discretization of the viscous terms, comparative studies of various orders‐of‐accuracy for the convective terms demonstrate that very‐high‐order upwind schemes can reproduce all the DNS details obtained by pseudospectral schemes, on computational grids of only slightly higher density. Copyright © 2009 John Wiley & Sons, Ltd.