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Abstract

It is known from experience that in many circumstances a uniform steady two-phase flow is stable. The predictions of analytical models for the same situation may or may not be stable however, a fact which provides some insight into the validity and usefulness of the models. It is shown both analytically and through practical examples that the stability against perturbations of finite wavelength depends not only on the (mathematical) characteristics but also on the expressions used to represent friction between the phases and between each phase and any confining structures. Some popular and some more recent models are considered in the light of the analytical results obtained, including the effects of frictional formulations, added mass forces, gravity terms etc., and general remarks are made concerning the utility of considering models separately from the numerical methods employed to solve them.

Additional information

Authors: JONES A V JRC ISPRA ESTAB. (ITALY), JRC ISPRA ESTAB. (ITALY)
Bibliographic Reference: 4TH MIAMI INTERNATIONAL SYMPOSIUM ON MULTIPHASE TRANSPORT AND PARTICULATE PHENOMENA, MIAMI BEACH, FLORIDA (USA) DEC. 15-17, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32883 ORA
Availability: Can be ordered online
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