NATURAL CONVECTIVE HEAT EXCHANGE OF A HEAT-GENERATING FLUID FOR DIFFERENT COOLING REGIMES ON THE BOUNDARIES (PREPRINT IBRAE-1995-13)

Preprint IBRAE-95-13

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

The quasisteady natural convection of a heat-generating fluid with regard to solidification for the different cooling regimes on the boundaries is investigated numerically in present work. The main goal of this paper is correlation relations for the Nusselt numbers, volume of solid phase, temperature etc. 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 reabilit.y 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. NATURAL CONVECTIVE HEAT EX­CHANGE OF A HEAT-GENERATING FLUID FOR DIFFERENT COOLING REGIMES ON THE BOUNDARIES (in Russian). – Preprint № IBRAE-95-13. Moscow: Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN), 1995. – 22 p. – Refs.: 16 items