Square cavity flow driven by two mutually facing sliding walls

作     者：Bo AN Josep M.BERGADà Weimin SANG Dong LI F.MELLIBOVSKY Bo AN;Josep M.BERGADà;Weimin SANG;Dong LI;F.MELLIBOVSKY

作者机构：School of AeronauticsNorthwestern Polytechnical UniversityXi'an 710072China National Key Laboratory of Science and Technology on Aerodynamic Design and ResearchXi'an 710072China Key Laboratory of Icing and Anti/De-icingChina Aerodynamics Research and Development CenterMianyang 621000China Department of Fluid MechanicsUniversitat Politécnica de CatalunyaBarcelona 08034Spain Department of PhysicsAerospace Engineering DivisionUniversitat Politécnica de CatalunyaBarcelona 08034Spain 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2023年第24卷第7期

页      面：612-624页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the projects of the Northwestern Polytechnical University(No.G2021KY05103) the Natioanl Key Laboratory of Science and Technology on Aerodynamic Design and Research(No.614220121030101) the Key Laboratory of Icing and Anti/De-icing of China Aerodynamics Research and Development Center(No.IADL20210302) the Spanish Government(Nos.FIS 2016-77849-R and PID2020114043GB-I00),the Catalan Government(No.2017-2017-SGR00785) the Barcelona Supercomputing Centre(Nos.FI2017-2-002,FI-2017-3-0009,and FI-2016-3-0038) 

主　　题：Two-sided wall-driven cavity Velocity ratios Transitions Flow topology Energy cascade 

摘      要：We investigate the flow inside a 2D square cavity driven by the motion of two mutually facing walls independently sliding at different *** exploration,which employs the lattice Boltzmann method(LBM),extends on previous studies that had the two lids moving with the exact same speed in opposite *** there,here the flow is governed by two Reynolds numbers(Re_(T),Re_(B))associated to the velocities of the two moving *** convenience,we define a bulk Reynolds number Re and quantify the driving velocity asymmetry by a parameterα.Parameterαhas been defined in the rangeα∈[-π4,0]and a systematic sweep in Reynolds numbers has been undertaken to unfold the transitional dynamics path of the two-sided wall-driven cavity *** particular,the critical Reynolds numbers for Hopf and NeimarkSacker bifurcations have been determined as a function ofα.The eventual advent of chaotic dynamics and the symmetry properties of the intervening solutions are also analyzed and *** study unfolds for the first time the full bifurcation scenario as a function of the two Reynolds numbers,and reveals the different flow topologies found along the transitional path.