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.
翻译:以下论文介绍了压缩两相或多构件流的两个模拟战略:一个是完全的非平衡模型,通过数字放松过程将压力和速度推向界面的平衡;第二个是四等式模型,采用各阶段或各组成部分之间的硬机械和热平衡;在这两种方法中,每种液体的热力行为均根据状态的硬化气体方程式独立模拟;采用所述方法模拟单维近距离下含有纯CO$2美元液体和蒸气的管道的减压。