In this paper, the problem of point source blast in air is computed numerically with a. TVD scheme proposed by A, Harten^[1]. During the computation, a grid hierarchy is introduced. The grids at different levels in the hierarchy are adjusted adaptively according to the distribution of pressure. Then,the computation marches to the next time step on the adjusted. grids. Numerical computation demonstrates the accuracy and efficiency of the proposed algorithm.

An adaptive grid algorithm for the computation of the problem of point source blast in air is proposed. In the algorithm, the refined subgrids are created adaptively in response to the estimated local.truncation error of the solution. The solution on the refined grids is used to correct the original solution on the coarse grids. Numerical computation demonstrates that the propsed algorithm is efficient.