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arXiv 1003.4454math.AP
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一个耗散储氢模型的存在性和正则性结果

A Dissipative Model for Hydrogen Storage: Existence and Regularity Results

Elisabetta Chiodaroli

摘要:

证明了一类高度非线性偏微分方程组的初边值问题边值问题整体解的存在性。这个问题来自于一个热力学耗散模型,该模型描述了金属颗粒储氢的过程。为了从分析的角度来对待模型,我们制定它作为一个相变现象,由于引入了一个合适的相位变量。连续介质力学定律导致涉及三个状态变量的演化问题:温度、相参数和压力。因此,该问题由三个耦合的偏微分方程与初始和边界条件相结合。通过时间离散--先验估计--通过与紧性和单调性论证相结合的极限过程,研究了解的存在性和正则性.

英文摘要:

We prove global existence of a solution to an initial and boundary value problem for a highly nonlinear PDE system. The problem arises from a thermomechanical dissipative model describing hydrogen storage by use of metal hydrides. In order to treat the model from an analytical point of view, we formulate it as a phase transition phenomenon thanks to the introduction of a suitable phase variable. Continuum mechanics laws lead to an evolutionary problem involving three state variables: the temperature, the phase parameter and the pressure. The problem thus consists of three coupled partial differential equations combined with initial and boundary conditions. Existence and regularity of the solutions are here investigated by means of a time discretization-a priori estimates-passage to the limit procedure joined with compactness and monotonicity arguments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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