O problema de Stefan de zero-fase para material em mudança de fase encapsulado com fluxo de calor unidimensional em ambas as faces

Abstract

This work presents an analytical study about the behavior of the mobile interface in an encapsulated phase change material, using as methodology the application of asymptotic analytical methods. The zero-phase Stefan problem approach was applied as it shows to be a simple method for the analyze effectuation. At the end, it was possible to obtain formulations for the positions of the mobile interfaces in the onedimensional phase change material, undergone transitional heat fluxes; varying the thickness of encapsulation for different types of materials and scales of time, in which the encapsulation does not attenuate the heat flux.