摘要: Several multigrid schemes are considered for the numerical computation of viscous hypersonic flows. For each scheme, basic solution algorithm employs upwind spatial discretization with explicit multistage time stepping. Two-level versions various algorithms applied to two-dimensional advection equation, and Fourier analysis is used determine their damping properties. The capabilities methods assessed by solving three different flow problems. Some new based on semicoarsening strategies shown be quite effective in relieving stiffness caused high-aspect-ratio cells required resolve high Reynolds number These exhibit good convergence rates numbers up 200 X 10{sup 6} Mach 25. 32 refs., 31 figs., 1 tab.
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