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A domain decomposition/finite element method for the numerical simulation of electrolytic cells

机译:电解池数值模拟的区域分解/有限元方法

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In this paper we propose a mathematical formulation for a heat transfer problem with an "interior thin layer" which arises from the thermal modelling of an electrolytic cell. Assuming that the layer is infinitely thin, the problem can be approximated by another one where the temperature presents a jump through an unknown interface, while the heat flux is still a continuous function. It is possible to formulate this free boundary problem as a mixed nonlinear problem the nonlinearity being a multivalued Heaviside function. We prove some results on existence of solution using regularization and fixed point techniques and propose a finite element method to compute a numerical approximation. This approach is combined with the use of a primal formulation in the cathode of the cell through domain decomposition techniques which allows us to use incompatible meshes on the interfaces.
机译:在本文中,我们为带有“内部薄层”的传热问题提出了数学公式,该问题由电解池的热模型产生。假设该层是无限薄的,则该问题可以用另一个问题来解决,在该问题中,温度会通过未知界面发生跃迁,而热通量仍是连续函数。可以将此自由边界问题表述为混合非线性问题,其中非线性是多值Heaviside函数。我们使用正则化和定点技术证明了解的存在性,并提出了一种用于计算数值逼近的有限元方法。通过域分解技术,这种方法与在细胞阴极中使用原始配方相结合,这使我们能够在界面上使用不兼容的网格。

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