Numerical Simulation Of Fluid-Solid Interaction Problems Based On ANSYS

Fluid-solid interaction mechanics is a branch of mechanics which is combined by fluid mechanics and solid mechanics. Just as the name implies, it studies the interaction between the diversified behaviors of deformable solids under the action of fluid field and the influence upon the fluid by the deformation of the solids. The important characteristics of fluid-solid interaction mechanics is the fluid-solid interaction between the both phase mediums: not only deformable solids will produce deformation and displacement under the action of fluid loading, but also the deformation or displacement will influence the fluid field and make the distribution and the strength of fluid loading change.Non-linear finite element analysis is very perfect in solid mechanics and achievement by CFD method in fluid mechanics is surprising. ALE technology provides a effective way which establish relation between lagrangian system used commonly in solid mechanics and eulerian system used commonly in fluid mechanics.In this article, using numerical analysis method, we established a fluid-solid interaction control equation taking solid and fluid as a unified mathematical model. Then we calculated the two-dimensional and three-dimensional fluid-solid interaction field, and obtained the deformation of the whole structure and the distribution of the field. In our calculation, ALE description is used in fluid domain in which the mesh point continuously renew with the motion of free surface of liquid or the movement of the contact surface between the structure and liquid.