流体-固体相互作用、碰撞和起飞的建模  

On modelling fluid/body interactions,impacts and lift-offs

作　　者：Frank T.Smith Ellen M.Jolley Ryan A.Palmer 

机构地区：[1]Department of Mathematics,University College London,London,UK [2]School of Biological Sciences,University of Bristol,Bristol,England [3]School of Mathematics,University of Bristol,Bristol,England

出　　处：《Acta Mechanica Sinica》2023年第5期1-12,共12页力学学报（英文版）

基　　金：Support from the Engineering and Physical Sciences Research Council(Grants Nos.EP/R511638/1,GR/T11364/01,EP/G501831/1,EP/H501665/1,and EP/K032208/1);University College London(two IAA awards);Aerotex UK is also acknowledged with gratitude.Thanks are due to the Beijing International Center for Theoretical;Applied Mechanics for their interest and invitation concerning this article.

摘　　要：本文是流体-固体相互作用机制方面的最新进展综述,主要研究固体物体自身的运动与其周围流体运动之间的相互影响.非稳态相互作用的数学模型是对两个空间维度和时间尺度的内部通道和外部近壁流的描述.本文重点描述伴随计算量减少的分析发展过程.文章讨论无黏性流中掠过和下沉、物体的起飞、飞离或弹跳,以及黏性效应,特别是黏性和无黏性之间的相互作用和影响.主要研究结果涉及撞击时间、起飞条件、撞击和飞离之间的边界、主要参数及其范围以及物体形状和质量对物理及力学机制的影响.A description is given of recent progress in the understanding of mechanisms in fluid-body interactions where the motion of a body and the motion of the surrounding fluid affect each other substantially.The mathematical modelling of such unsteady interactions is for internal channel and external near-wall flows in two spatial dimensions and time.The emphasis throughout is on analytical developments with accompanying reduced computation.The successive aspects studied here are interactions and impacts in inviscid flows,skimming and sinking,the lift-off,fly-away or bouncing of a body,and viscous effects including especially the interplay between viscous and inviscid contributions.The main findings are concerned with physical and mechanical insights into impact times,lift-off criteria,the borders between impact and fly-away,the principal parameters and their ranges and the influences from body shape and mass.

关 键 词：Fluid-body interactions SKIMMING IMPACTS Analysis 

分 类 号：O35[理学—流体力学]