An Arbitrary Lagrangian-Eulerian method for Oscillation of a Cylindrical Body in Flow

초록

In the present, a computational method based on the Arbitrary Lagrangian Eulerian (ALE) finite element method (FEM) is developed to investigate the fluid-rigid body interaction, in particular the so-called lock-in phenomenon of oscillation of a cylindrical body in the flow field. Viscous, two-dimensional flow is considered and the incompressibility is accommodated by a FEM penalty formulation in the computation. ALE concept is implemented to solve the fluid-structure coupling problem with a rezoning algorithm to handle large distortion of mesh. A numerical example is presented in order to illustrate the simulation of the lock-in effect of a circular cylinder. It assumes that the body is elastically sprung and possesses mechanical damping in the across-wind direction, and it is rigidly constrained in the along-wind direction. Numerical results are compared with other experimental data. This work was supported by grant No. R01-2002-000-00060-0 from the Basic Research Program of the Korea Science and Engineering Foundation.