B111 ウェーブレットを用いた二次元数値流体解析

抄録

Direct numerical simulation of two-dimensional incompressible flow is performed using 4^th order spline wavelet. The Poisson. equation between stream-function and vorticity can be efficiently solved by diagonal preconditioning following discrete wavelet transform. The transform coefficients of vorticity or stream-function make clearly understandable of the multiscale structure of solution.