Wei-wen Zhao, Fu-chang Zhou, Guo-qing Fan, De-cheng Wan
{"title":"Assessment of subgrid-scale models in wall-modeled large-eddy simulations of turbulent channel flows","authors":"Wei-wen Zhao, Fu-chang Zhou, Guo-qing Fan, De-cheng Wan","doi":"10.1007/s42241-023-0039-6","DOIUrl":null,"url":null,"abstract":"<div><p>Considering the demanding of grid requirements for high-Reynolds-number wall-bounded flow, the wall-modeled large-eddy simulation (WMLES) is an attractive method to deal with near wall turbulence. However, the effect of subgrid-scale (SGS) models for wall-bounded turbulent flow in combination with wall stress models is still unclear. In this paper, turbulent channel flow at <i>Re</i><sub><i>τ</i></sub> =1 000 are numerically simulated by WMLES in conjunction with four different SGS models, i.e., the wall-adapting local eddy-viscosity model, the dynamic Smagorinsky model, the dynamic SGS kinetic energy model and the dynamic Lagrangian model. The mean velocity profiles are compared with the law of the wall, and the velocity fluctuations are compared with direct numerical simulation data. The energy spectrum of velocity and wall pressure fluctuations are presented and the role of SGS models on predicting turbulent channel flow with WMLES is discussed.</p></div>","PeriodicalId":637,"journal":{"name":"Journal of Hydrodynamics","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Hydrodynamics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s42241-023-0039-6","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Considering the demanding of grid requirements for high-Reynolds-number wall-bounded flow, the wall-modeled large-eddy simulation (WMLES) is an attractive method to deal with near wall turbulence. However, the effect of subgrid-scale (SGS) models for wall-bounded turbulent flow in combination with wall stress models is still unclear. In this paper, turbulent channel flow at Reτ =1 000 are numerically simulated by WMLES in conjunction with four different SGS models, i.e., the wall-adapting local eddy-viscosity model, the dynamic Smagorinsky model, the dynamic SGS kinetic energy model and the dynamic Lagrangian model. The mean velocity profiles are compared with the law of the wall, and the velocity fluctuations are compared with direct numerical simulation data. The energy spectrum of velocity and wall pressure fluctuations are presented and the role of SGS models on predicting turbulent channel flow with WMLES is discussed.
期刊介绍:
Journal of Hydrodynamics is devoted to the publication of original theoretical, computational and experimental contributions to the all aspects of hydrodynamics. It covers advances in the naval architecture and ocean engineering, marine and ocean engineering, environmental engineering, water conservancy and hydropower engineering, energy exploration, chemical engineering, biological and biomedical engineering etc.