简单的情况是半无界固液相变，固体和液体之间的界面用S（t）表示．固体凝固或熔解时，S（t）会产生移动。如图4．9．界面S（t）加位置与温度分布相关，这类问题称为Stefan（斯特芬）问题，富有应用价值．取一维的模型，讨论半无界空间过冷液体的凝固过程．取x= S（t）为固液界面， x< S（t）区...
A 1D phase change problem, known as Stefan’s problem, for which analytical solutions are available, is solved as a 2D problem using COMSOL Multiphysics. The PCM medium is semi-infinite, initially solid at its melting temperature Tm, and at t = 0, the wall temperature is raised to T...
Usually, the Stefan problem is associated to the crystallization of melted solids, in which the energy transfer (heat diffusion) dominates the process. In the present work, the Stefan problem was solved for the crystallization of solutions, i.e., a situation in which mass transfer is the most...
tion. In particular, this model can be applied to the widely A simple level set method for solving Stefan problems is pre- studied problem of dendritic crystal growth. sented. This method can be applied to problems involving dendritic Th... S Chen,B Merriman,S Osher,... 被引量: 0发表...
Using genetic algorithms for the determination of an heat transfer coefficient in three-phase inverse Stefan problem In the paper, an example is presented of the application of a genetic algorithm to a design inverse Stefan problem. The problem consists in the reconstruct... D S?Ota - 《Interna...
S Gartner,J Keany - 《Geology》 被引量: 48发表: 1978年 Extinction behaviour for two-dimensional inward-solidification problems The problem of the inward solidification of a two-dimensional region of fluid is considered, it being assumed that the liquid is initially at its fusion te... SW Mccu...
Stefan problemheat potentialsintegral equationsWe report some results on nonstandard potentials and their application to solution of the Stefan problem.doi:10.1155/S1048953390000132Malyshev IgorJournal of Applied Mathematics and Stochastic AnalysisInternational Journal of Stochastic Analysis...
We discuss the existence of weak solutions to a steady-state coupled system between a two-phase Stefan problem, with convection and non-Fourier heat diffusion, and an elliptic variational inequality traducing the non-Newtonian flow only in the liquid phase. In the Stefan problem for the p-Lapla...
摘要: The problem presented below is a singular-limit problem of the extension of the Cahn-Hilliard model obtained via introducing the asymmetry of the surface tension tensor under one of the truncations (approximations) of the inner energy [, –, , , ]....