Community Research and Development Information Service - CORDIS


The flow of a chemically reacting, two-phase mixture through a tube of constant flow section has been studied. A general purpose model that describes multi-component, critical two-phase flow in pipes of constant cross-section is presented. When the exit pressure is lower than a certain value, critical conditions prevail, i.e. the mass flow depends only on the geometrical tube data and on the upstream stagnation conditions. The presence of an ongoing chemical reaction introduces a non-linearity into the system, due to the strong temperature dependence of the reaction rate. As a result, multiple steady state solutions may occur. For a certain range of tube length, identical boundary conditions lead to three different mass flows. Under certain conditions the system may jump from one solution to another. This phenomenon is important in relation to safety questions which arise in the chemical industry, where emergency relief actions are taken.

Additional information

Authors: FRIZ G, JRC Ispra (IT);DUFFIELD J S, JRC Ispra (IT)
Bibliographic Reference: Paper presented: 26th European Two-phase Flow Group Meeting, Roma (IT), May 27-29, 1991
Availability: Available from (1) as Paper EN 36185 ORA
Record Number: 199111342 / Last updated on: 1994-12-02
Original language: en
Available languages: en