Abstract
A new method for computation which make an analysis of flow field around an arbitrary shaped body with elastic deformation by fluid force have been developed. Non-linear simultaneous equations are derived from governing equations of flow field and elastic deformation, and then the non-linear simultaneous equations are solved using Nowton-Raphson method. An independent variable is only fluid force in the equation of elastic deformation. The flow field is defined as implicit function of the fluid force acting on an elastic boundary. The number of the unkown quantity in Newton-Raphson method decreases substantially. The velocity field and the pressure field are computed after the fluid force acting on an elastic boundary is obtained. In this paper, we explain the principle of the computational method, and then two examples of numerical simulation are shown. One is the flow-induced oscillation of three-dimensional circular cylinder that is supported elastically and another is the computation of flow around an elastic wing with pitching motion.
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