{"title":"Application of Hybrid RANS/LES Methods for the Simulation of Shock-Induced Turbulent Boundary Layer Separation","authors":"A. I. Troshin, S. V. Bakhne","doi":"10.1134/s2070048224010113","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of shock-induced turbulent boundary layer separation simulations using scale-resolving methods with wall modelling (WMLES) are presented. A test case is chosen for which experimental data and reference large eddy simulation results are available. The IDDES method based on the SST turbulence model in the WMLES mode is compared with a similar method in which the explicit subgrid scale model is turned off. In the second approach, two schemes of the WENO family are considered. In each case, two grids of different densities are employed. The separation size, pressure, and friction coefficient distributions along the wall, and one-point pressure probability density functions at two reference points are compared. An unexpected result is demonstrated: in all the eddy-resolving simulations, the separation region’s length turns out to be underestimated by 15–28%, and no significant reduction in the error with grid refinement is observed. Possible reasons for this phenomenon are discussed.</p>","PeriodicalId":38050,"journal":{"name":"Mathematical Models and Computer Simulations","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mathematical Models and Computer Simulations","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1134/s2070048224010113","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Mathematics","Score":null,"Total":0}
引用次数: 0
Abstract
The results of shock-induced turbulent boundary layer separation simulations using scale-resolving methods with wall modelling (WMLES) are presented. A test case is chosen for which experimental data and reference large eddy simulation results are available. The IDDES method based on the SST turbulence model in the WMLES mode is compared with a similar method in which the explicit subgrid scale model is turned off. In the second approach, two schemes of the WENO family are considered. In each case, two grids of different densities are employed. The separation size, pressure, and friction coefficient distributions along the wall, and one-point pressure probability density functions at two reference points are compared. An unexpected result is demonstrated: in all the eddy-resolving simulations, the separation region’s length turns out to be underestimated by 15–28%, and no significant reduction in the error with grid refinement is observed. Possible reasons for this phenomenon are discussed.
期刊介绍：
Mathematical Models and Computer Simulations is a journal that publishes high-quality and original articles at the forefront of development of mathematical models, numerical methods, computer-assisted studies in science and engineering with the potential for impact across the sciences, and construction of massively parallel codes for supercomputers. The problem-oriented papers are devoted to various problems including industrial mathematics, numerical simulation in multiscale and multiphysics, materials science, chemistry, economics, social, and life sciences.
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