其他摘要：We consider a slab, represented by the interval 0 0 on the left face x=0 and a temperature condition b(t) > 0 on the right face x = Xo (Xo could be also +∞, i.e., a semi-infinite material). We consider the corresponding heat conduction problem and we assume that the phase-change temperature is O°C. We make the numerical analysis of the problem through two distinctic finite difference methods, one implicit and the other explicit We prove that certain conditions on the data are necessary and/or sufficient in order to obtain the existence of a waiting-time at which a phase.change begins in the discrete problem.
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