摘要：The coherent-structures Smagorinsky model (CSM) is an eddy viscosity subgrid-scale (SGS) model which has been successfully used in large eddy simulation (LES) of turbulent flows. However, the LES results are not in good agreement with those obtained by direct numerical simulation (DNS) in turbulent channel flow. To improve underlying demerits of CSM, the present paper proposes an improved CSM (ICSM) in which the energy-decay suppression function is defined from the perspective of physical meaning. Furthermore, a mixed SGS model which combines ICSM with TADM named MILT is established for the LES of surfactant-induced drag reduction in turbulent channel flow in this study. The main idea of MILT is to apply ICSM to perform spatial filtering for the continuity and momentum equations and adopt TADM to perform temporal filtering for the constitutive equation, respectively. Simulation results indicate that, compared with the conventional SGS models (CSM and ma), results obtained by ICSM and MILT agree better with those of DNS. (C) 2016 Elsevier Ltd. All rights reserved.

关键字：Coherent-structures Smagorinsky model Mixed subgrid-scale model Large eddy simulation Drag reduction Turbulent channel flow

ISSN号：1359-4311

卷、期、页：卷: 115 页: 1322-1329

发表日期：2017-03-25

影响因子：0.000000

收录情况：SCIE（科学引文索引网络版）,ESI（基本科学指标数据库）,EI（工程索引）

发表期刊名称：Applied Thermal Engineering

参与作者：宇波,王璐,李凤臣

通讯作者：李敬法

第一作者：侯磊

论文类型：期刊论文

论文概要：李敬法,宇波,王璐,李凤臣,侯磊，A mixed subgrid-scale model based on ICSM and TADM for LES of surfactant-induced drag-reduction in turbulent channel flow，Applied Thermal Engineering，2017，卷: 115 页: 1322-1329

论文题目：A mixed subgrid-scale model based on ICSM and TADM for LES of surfactant-induced drag-reduction in turbulent channel flow