剛体着水現象の数値解析のためのマーカー粒子法を併用した有限要素法

概要

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The present paper deals with a finite element method for the solution of a two-dimensional time-dependent free surface flow problem and its application to the analysis of the low-velocity impact of a rigid body into still water. For the ease of numerical treatment of the free surface expressed by a multiple-valued function, a marker-particle method is employed. Numerous virtual particles are spread over regions occupied by water. Each particle is moved according to the water velocity on a fixed finite element mesh. The velocity field within water regions is calculated by solving the Navier-Stokes equations and the equation of continuity by the finite element method based on quadrilateral elements. The methodological problems arising in the implementation of the marker-particle method on an unstructured mesh of finite elements and the solutions to those problems are discussed. Numerical results are compared with available experimental data and good agreement is obtained.
一般社団法人日本機械学会の論文
1995-03-25