基于添加粘度抵消项的MRT-LBM对高雷诺数流态的研究  

Research on High Reynolds Number Flow Using MRT-LBM with Viscosity Counteracting

作　　者：张宗宁 张巧玲 景何仿[3] 沈启霞[1] Zhang Zongning;Zhang Qiaoling;Jing Hefang;Shen Qixia(Department of Basic Courses,Zhengzhou University of Science and Technology,Zhengzhou 450064;Department of Teaching and Research of Basic Courses,Guangdong Technology College,Guangdong Zhaoqing 526100;School of Civil Engineering,North Minzu University,Yinchuan 750021)

机构地区：[1]郑州科技学院,郑州450064 [2]广东理工学院,广东肇庆526100 [3]北方民族大学,银川750021

出　　处：《数学物理学报（A辑）》2024年第5期1216-1229,共14页Acta Mathematica Scientia

基　　金：国家自然科学基金(11861003,11761005);宁夏自然科学基金(2023AAC02049,2022AAC02004);河南省高校重点科研项目(24B110020)。

摘　　要：该文探究了添加粘度抵消方法(viscosity counteracting,VC)的多松弛格子玻尔兹曼方法(multiple-relaxation-time lattice Boltzmann method,MRT-LBM),即MRT-VC方法可以模拟的最大雷诺数.首先,模拟了经典二维顶盖驱动方腔流来验证模型的准确性,重点分析了雷诺数为5430和7000的流场,并分析了方腔流流场、涡心坐标、轴向速度和速度空间图谱.其次,随着模拟雷诺数的增大,流场内旋涡的数目逐渐增加,且流动依次呈现出稳定流、周期流、不完全混沌流、混沌流等状态.从稳定流到周期流的临界跃迁雷诺数在10000-12500之间,周期流到不完全混沌态流的临界跃迁雷诺数在45000-50000之间,不完全混沌态流到混沌流的临界跃迁雷诺数在95000-100000之间.This paper explores the maximum Reynolds number that can be simulated by the multiple-relaxation-time lattice Boltzmann method with viscosity counteracting(MRT-VC).Firstly,the accu-racy of the model is validated by simulating the classic 2D lid-driven cavity fow.The focus is on the flow fields at Reynolds numbers of 5430 and 7000,analyzing the flow fields,vortex core coordinates,axial velocity,and velocity spectra.Secondly,as the simulated Reynolds number increases,the number of swirling vortices in the fow field gradually increases.The flow exhibits a sequence of stable fow,periodic flow,incomplete chaotic fow,and chaotic flow.The critical transition Reynolds number from stable flow to periodic flow is between 10000 and 12500,from periodic flow to incomplete chaotic flow is between 45000 and 50000,and from incomplete chaotic flow to chaotic flow is between 95000 and 100000.

关 键 词：多松弛时间格子玻尔兹曼方法 粘度抵消方法 高雷诺数流 临界跃迁雷诺数 

分 类 号：O357.5[理学—流体力学]