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首页> 外文期刊>Journal of Computational Physics >Two-phase flow with mass density contrast: Stable schemes for a thermodynamic consistent and frame-indifferent diffuse-interface model
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Two-phase flow with mass density contrast: Stable schemes for a thermodynamic consistent and frame-indifferent diffuse-interface model

机译:具有质量密度对比的两相流:热力学一致且无框架扩散界面模型的稳定方案

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摘要

In this paper, we present a numerical scheme for the diffuse-interface model in [3] for two- phase flow of immiscible, incompressible fluids. As that model is in particular consistent with thermodynamics, energy estimates are expected to carry over to the discrete setting. By a subtle discretization of the convective coupling with the flux of the phase-field in the momentum equation, we prove discrete consistency with thermodynamics. Numerical experiments in two spatial dimensions - ranging from Rayleigh-Taylor instability to a comparison with previous modeling approaches - indicate the full practicality of our scheme and enable a first validation of the new modeling approach in [3].
机译:在本文中,我们在[3]中为不可溶,不可压缩流体的两相流提出了扩散界面模型的数值方案。由于该模型特别符合热力学,因此预计能量估计会延续到离散设置中。通过对流耦合与动量方程中相场通量的细微离散,我们证明了与热力学的离散一致性。从Rayleigh-Taylor不稳定性到与以前的建模方法的比较,在两个空间维度上进行的数值实验表明了我们方案的完全实用性,并且可以在[3]中首次验证新的建模方法。

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