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1992
Journal Article
Titel
Numerical investigation of convection/diffusion phase change of a metal with temperature-dependent viscosity
Abstract
Heat and mass transfer during crystallization in a square cavity, involving natural laminary convection of liquid metal with temperature-dependent viscosity, are investigated numerically on a grid with 51 × 51 nodes. A brief survey of existing techniques for convection/diffusion phase change problems is given. A fixed grid numerical methodology, based on the fictitious regions method, is used for solving the 2-D Stefan problem coupled with the Navier-Stokes equations in the Boussinesq approximation. The viscosity variation is modelled by an exponential form, n/n0 = exp ( - a(T - 1)). The influence of the Grashof number and of the parameter a on heat and mass transfer are investigated.