Exact solution for a Stefan problem with latent heat a power function of position

Exact solution for a Stefan problem with latent heat a power function of position
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潜热位置幂函数 Stefan 问题的精确解

DOI:
10.1016/j.ijheatmasstransfer.2013.10.043
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发表时间:
2014-02
影响因子:
5.2
通讯作者:
Bu, Wan-kui
Bu, Wan-kui
中科院分区:
工程技术2区
文献类型:
--
作者:
Zhou, Yang;Wang, Yi-jiang;Bu, Wan-kui

文献摘要

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研究了潜热为位置幂函数的单相Stefan问题。第二类边界条件,表面热流被认为是时间的幂函数。该问题可以看作是海洋深度非线性变化和表面通量随时间变化的条件下的海岸线运动问题的一个特殊情况。利用相似变换技术构造了精确解。理论上证明了精确解的存在唯一性。在文献中提出的一些特殊情况下的解决方案被恢复。最后给出了精确解的计算实例,其结果可用于验证一般数值相变算法的精度。
A one-phase Stefan problem with latent heat a power function of position is investigated. The second kind of boundary condition is involved, and the surface heat flux is considered as a corresponding power function of time. The problem can be viewed as a special case of the shoreline movement problem under the conditions of nonlinear variation of ocean depth and a surface flux that varies as a power of time. An exact solution is constructed using the similarity transformation technique. Theoretical proof for the existence and the uniqueness of the exact solution is conducted. Solutions for some special cases presented in the literature are recovered. In the end, computational examples of the exact solution are presented, and the results can be used to verify the accuracy of general numerical phase change algorithms.
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