IMPROVED ALGORITHM FOR TRANSIENT MULTICOMPONENT, MULTIPHASE FLOWS
An improved numerical method has been developed for analysing transient one-dimensional particle, droplet, annular or bubbly flows which are characterized by the presence of dense solid and/or liquid phase and a light gas phase. A proper treatment of the slip between the dense and the light components and heat and mass exchange processes is important in the Fast Reactor Safety applications for which this new method is currently applied. The present improvement consists of treating the momentum equation of the light components implicitly. The dense components, whose inertia does not allow changes in velocity as rapid as those of the light components, are still treated explicitly. With the improved algorithm, an order of magnitude larger time step can be used for conditions with high void fractions. Details of the new method and comparison calculations with the old method for a transient compressible Fast Reactor Safety problem involving several components and three phases are presented in this paper.
Bibliographic Reference: 5TH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN LAMINAR AND TURBULENT FLOW, MONTREAL (CANADA), JULY 6-10, 1987 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 33444 ORA
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Record Number: 1989126017600 / Last updated on: 1989-03-01
Available languages: en