A local discontinuous Galerkin method for the (non)-isothermal Navier-Stokes-Korteweg equations

Lulu Tian, Y. Xu, Yan Xu, Johannes G.M. Kuerten, Jacobus J.W. van der Vegt

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    Abstract

    In this article, we develop a local discontinuous Galerkin (LDG) discretization of the (non)-isothermal Navier-Stokes-Korteweg (NSK) equations in conservative form. These equations are used to model the dynamics of a compressible fluid exhibiting liquid-vapour phase transitions. The NSK-equations are closed with a Van der Waals equation of state and contain third order nonlinear derivative terms. These contributions frequently cause standard numerical methods to violate the energy dissipation relation and require additional stabilization terms to prevent numerical instabilities. In order to address these problems we first develop an LDG method for the isothermal NSK equations using discontinuous finite element spaces combined with a time-implicit Runge-Kutta integration method. Next, we extend the LDG discretization to the non-isothermal NSK equations. An important feature of the LDG discretizations presented in this article is that they are relatively simple, robust and do not require special regularization terms. Finally, computational experiments are provided to demonstrate the capabilities, accuracy and stability of the LDG discretizations.
    Original languageUndefined
    Pages (from-to)685-714
    Number of pages30
    JournalJournal of computational physics
    Volume295
    DOIs
    Publication statusPublished - 25 Aug 2015

    Keywords

    • EWI-26297
    • IR-97331
    • METIS-312718

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