Hyperbolic two-pressure models for two-phase flow revisited

This paper presents correction to a previous paper (J. Comput. Phys. 53 (1984). 124) on stability analyses of one-pressure models for two-phase flow. It also presents some extensions and generalization of previous work on two-pressure models. The extensions allow both the slopes to the interfaces and the rates of mass transfer through the interfaces to be non-negligible. These enlargements of the domain of applicability of the two-pressure models introduce extra derivative terms into the models. These extra derivative terms do not change the basic character of the model. The two-pressure models remain stable in the sense of von Neumann a.e. in state space with the more complete modeling of the interface. copyright 1988 Academic Press, Inc.