Numerical Investigation on the Deformation of the Free Interface During Water Entry and Exit of a Circular Cylinder by Using the Immersed Boundary-Multiphase Lattice Boltzmann Flux Solver  

基于浸没边界-多相格子玻尔兹曼通量法的圆柱体出入水时自由液面形态的数值模拟

作　　者：Guiyong Zhang Haoran Yan Hong Song Heng Wang Da Hui 张桂勇;燕浩然;宋虹;王恒;回达(State Key Laboratory of Structural Analysis for Industrial Equipment,School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,China;Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China;College of Engineering,Ocean University of China,Qingdao 266100,China;College of Engineering,Peking University,Beijing 100871,China)

机构地区：[1]State Key Laboratory of Structural Analysis for Industrial Equipment,School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,China [2]Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China [3]College of Engineering,Ocean University of China,Qingdao 266100,China [4]College of Engineering,Peking University,Beijing 100871,China

出　　处：《Journal of Marine Science and Application》2022年第3期99-113,共15页船舶与海洋工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(52061135107);the Fundamental Research Fund for the Central Universities(DUT20TD108,DUT20LAB308);the Liao Ning Revitalization Talents Program(XLYC1908027),and Dalian Innovation Research Team in Key Areas(2020RT03).

摘　　要：In this work,the deformation of free interface during water entry and exit of a circular cylinder is investigated numerically by using the two-dimensional(2D)immersed boundary-multiphase lattice Boltzmann flux solver(IB-MLBFS).The fluid domain is discretized by finite volume discretization,and the flux on the grid interface is evaluated by lattice Boltzmann equations.Both the implicit velocity correction and the surface flux correction are implemented by using the immersed boundary-method to consider the fluid-structure interaction and the contact interface between the multiphase fluids and the structure.First,the water entry of a circular cylinder is simulated and the results are compared with the experiment,which considered the length-diameter ratio of the circular cylinder.The reliability of 2D simulation is verified and the deformation of the free interface is well investigated.Afterward,the water exit of a circular cylinder with constant velocity is simulated,which is less researched.In addition,the results show the advantage of present IB-MLBFS to some extent.Finally,the water exit and re-entry of a circular cylinder are presented,and the results present the complex deformation of the free interface and the dynamic response of the moving structure.Based on the numerical results,the free interface of the multiphase fluids is well captured,and the contact interface on the boundary of the moving structure is accurately presented by the IB-MLBFS.

关 键 词：Free interface Water entry Water exit Immersed boundary method Lattice Boltzmann flux solver 

分 类 号：U661[交通运输工程—船舶及航道工程]