NUMERICAL INVESTIGATION OF THE HEAT EXCHANGE IN A HEAT-GENERATING FLUID WITH MELTING AND SOLIDIFICATION DEPENDING ON OSTROGRADSKII AND RAYLEIGH NUMBERS (PREPRINT IBRAE-1995-01)

Preprint IBRAE-95-01

Aksenova A.E., Chudanov V.V., Vabishchevich P.N. 

The quasisteady natural convection of a heat-generating fluid with phase changes in the enclosures of a square section with isothermal boundary conditions is investigated numerically in present work. The main goal of this paper is correlation relations for heat fluxes distribution at the domain boundaries depending on Rayleigh and Ostrogradskii numbers.

To solve unsteady problems of hydrodynamics with heat conductivity, new efficient numerical method, inspected at the wide set of test problem, was employed. The obtained numerical results were verified on reability via conducting of calculations on the sequence of the fine grids.

These results may be used for construction of simplified models describing the behaviour of a molten heat-generating masses (corium) in different retention system(core catcher). 

Bibliographical reference

Aksenova A.E., Chudanov V.V., Vabishchevich P.N. NUMERICAL INVESTIGATION OF THE HEAT EXCHANGE IN A HEAT-GENERATING FLUID WITH MELTING AND SOLIDIFICATION DEPENDING ON OSTROGRADSKII AND RAYLEIGH NUMBERS. – Preprint № IBRAE-95-01. Moscow: Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN), 1995. – 25 p. – Refs.: 21 items