Computation of Multiphase Mixture Flows with Compressibility Effects
Computation of Multiphase Mixture Flows with Compressibility Effects
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DOI：
10.1006/jcph.2002.7062
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发表时间：
2002-07
影响因子：
4.1
通讯作者：
S. Venkateswaran;J. Lindau;R. Kunz;C. Merkle
中科院分区：
文献类型：
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作者：
S. Venkateswaran;J. Lindau;R. Kunz;C. Merkle
开发了一种时间推进计算流体动力学方法，并将其应用于多相混合流的计算。该模型考虑了各组成相中的有限声速，这通常会导致跨音速/超音速流动以及相关的可压缩性现象，比如在混合区域形成激波。利用微扰理论设计了预处理或人工可压缩性方法，以确保该方法在不可压缩和可压缩流动状态下都能保持效率和准确性。将所得算法纳入现有的多相代码中，并通过几个有代表性的应用来展示该方法的能力。特别是，我们的结果表明，与之前的不可压缩计算相比，当前的可压缩公式对空化动力学提供了更完善的描述。
A time-marching computational fluid dynamics method is developed and applied to the computation of multiphase mixture flows. The model accounts for finite acoustic speeds in the constituent phases, which typically lead to transonic/supersonic flow and associated compressibility phenomena such as shock formation in the mixture region. Preconditioning or artificial compressibility methods are devised using perturbation theory to insure that the method retains efficiency and accuracy in both the incompressible and compressible flow regimes. The resulting algorithm is incorporated within an existing multiphase code, and several representative applications are used to demonstrate the capabilities of the method. In particular, our results suggest that the present compressible formulation provides an improved description of cavitation dynamics compared with previous incompressible computations.