Unsteady gas-liquid two-phase flow analysis by the characteristics method, 1

In the analysis of unsteady two-phase flow by using the characteristics method, the changes of mixture density and acoustic velocity induced by the changes of pressure and phase have a significant effect to determine a difinite numerical calculation. The present report describes that among the problems which must be solved for this purpose the effect of differential value change in the one step of numerical calculation should be firstly taken into consideration by using an adequate numerical method. (author)