Qualitative Behavior of Solutions for Thermodynamically Consistent Stefan Problems with Surface Tension

Qualitative Behavior of Solutions for Thermodynamically Consistent Stefan Problems with Surface Tension
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具有表面张力的热力学一致 Stefan 问题解的定性行为

DOI:
10.1007/s00205-012-0571-y
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发表时间:
2013
影响因子:
2.5
通讯作者:
Rico Zacher
Rico Zacher
中科院分区:
数学1区
文献类型:
--
作者:
Jan Prüss;Gieri Simonett;Rico Zacher

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研究了具有表面张力的热力学相容两相Stefan问题在有或无动力学过冷的情况下的定性行为。结果表明,这些问题在定义良好的状态流形上产生局部半流。如果解不表现出本文所给出的精确意义上的奇性,则证明了它在时间上是整体存在的,并且它的轨道是相对紧的。此外,还研究了平衡点的稳定性和不稳定性。特别是,结果表明,相同半径的多个球体是不稳定的,这让人想起Ostwald成熟的开始。
We study the qualitative behavior of a thermodynamically consistent two-phase Stefan problem with surface tension and with or without kinetic undercooling. It is shown that these problems generate local semiflows in well-defined state manifolds. If a solution does not exhibit singularities in a sense made precise herein, it is proved that it exists globally in time and its orbit is relatively compact. In addition, stability and instability of equilibria are studied. In particular, it is shown that multiple spheres of the same radius are unstable, reminiscent of the onset of Ostwald ripening.
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