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arXiv 2006.01630physics.comp-phcs.NAmath.NAphysics.flu-dyn
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多组分和多相可压缩流动的模拟

On the simulation of multicomponent and multiphase compressible flows

Rémi Abgrall, Paola Bacigaluppi, Barbara Re

摘要:

本文介绍了两种可压缩两相或多组分流动的模拟策略。一个是完全非平衡模型,其中压力和速度被驱动到平衡的界面处的数值松弛过程,第二个是四方程模型,假设刚性的机械和热平衡之间的相位或组件。在这两种方法中,每种流体的热力学行为是独立建模的硬化气体状态方程。在一维近似下,用所提出的方法模拟了含纯CO $_2$液体和蒸汽的管道的降压过程。

英文摘要:

The following paper presents two simulation strategies for compressible two-phase or multicomponent flows. One is a full non-equilibrium model in which the pressure and velocity are driven towards the equilibrium at interfaces by numerical relaxation processes, the second is a four-equation model that assumes stiff mechanical and thermal equilibrium between phases or components. In both approaches, the thermodynamic behaviour of each fluid is modelled independently according to the stiffened-gas equations of state. The presented methods are used to simulate the de-pressurization of a pipe containing pure CO$_2$ liquid and vapour under the one-dimensional approximation.

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