典型文献
A Liutex-based subgrid stress model for large-eddy simulation
文献摘要：
The concept of vortex is crucial in both understanding and modeling of turbulence. For large eddy simulation (LES), the effect of small-scale eddies onto the large scales or the resolved flow field is modeled by subgrid stress models. Even though the rotating motions of fluids, i.e., vortices or eddies are central in developing turbulent models, vortex identification methods are seldom used in these models. In this study, we develop a new subgrid model based on the Liutex vector, a new quantity introduced to decompose fluid motions into rigid rotation, pure shear and stretching, and thus identify vortices. The new model is then applied in a decaying homogeneous isotropic turbulence (DHIT) and a turbulent channel flow at Reynolds number the new model can predict accurate energy spectra compared with experiments in DHIT and give a well-matched velocity profile in turbulent channel flow without changing the form of the model. Future directions include improvement of the Liutex based model, for example developing anisotropic subgrid models, and its applications in various turbulent flows.
文献关键词：
中图分类号：
作者姓名：
Yuan Ding;Bi-yu Pang;Bo-wen Yan;Yi-qian Wang;Yu-xuan Chen;Yue-hong Qian
作者机构：
School of Mathematical Science,Soochow University,Suzhou 215006,China;Department of Computer Science and Technology,Tsinghua University,Beijing 100084,China
文献出处：
引用格式：
[1]Yuan Ding;Bi-yu Pang;Bo-wen Yan;Yi-qian Wang;Yu-xuan Chen;Yue-hong Qian-.A Liutex-based subgrid stress model for large-eddy simulation)[J].水动力学研究与进展B辑,2022(06):1145-1150
A类：
subgrid,DHIT
B类：
Liutex,stress,large,eddy,simulation,concept,vortex,crucial,both,understanding,modeling,turbulence,For,LES,effect,small,eddies,onto,scales,resolved,field,modeled,by,models,Even,though,rotating,motions,fluids,vortices,central,developing,turbulent,identification,methods,seldom,used,these,In,this,study,new,vector,quantity,introduced,decompose,into,rigid,rotation,pure,shear,stretching,thus,identify,then,applied,decaying,homogeneous,channel,Reynolds,number,can,predict,accurate,energy,spectra,compared,experiments,give,well,matched,velocity,profile,without,changing,form,Future,directions,include,improvement,example,anisotropic,its,applications,various,flows
AB值：
0.544461
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