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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

A FINITE ELEMENT MODEL TOR THERMAL INCOMPRESSIBLE FLOWS WITH MOVING FREE BOUNDARIES

Get access (open in a dialog) DOI: 10.1615/IHTC10.3930
pages 373-378

要約

Our study deals with a 2D or axisymetric finite element model for general free surface incompressible flows with heat exchange, like those encountered in metal moulding. Such flows can present very complicated moving free surface boundaries, so Lagrangian description is not recommended. Our model is based on an Eulerian approach, the free surface being advected through a fixed mesh. At each time step, the new location of the free surface is obtained by solving a purely advective equation for a pseudo-concentration function. The velocity field in the whole domain, including all fluids separated by the free surface, is then updated by solving continuity and Navier-Stokes equations in primitive variable (u,v,p) formulation. Finally, the temperature field is evaluated in the different fluids and in the solid walls of the container. The model performances will be demonstrated in the nuclear security domain with the simulation of corium discharge, following an ultimate failure.