抄録
In this paper, initial flows around an uniformly accelerated elliptic cylinder in an incompressible fluid are analysed from at rest by the finite difference method, and time histories of streamlines, equi-vorticity lines and drag coefficients are shown. The numerical schemes used here are the DuFort-Frankel technique for solving the vorticity equation and the DuFort-Frankel technique for solving the stream function. For the latter case, the discrete Fourier transform and the Gauss elimination are applied to the analysis of a block tridiagonal matrix. Especially, with 70 average iterations per time step for the SOR method, the Fourier series method are verified to be more than 10 times faster.
