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首页> 外文期刊>Journal of Computational Physics >A balanced-force algorithm for two-phase flows
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A balanced-force algorithm for two-phase flows

机译：两相流的平衡力算法

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Numerical methods for imposing body forces in two-phase flow simulations are discussed. Numerical schemes are presented to avoid the inaccurate solutions that result from inconsistent implementation of forces. First, the momentum equations are discretized so that they accurately accommodate the discontinuity in fluid properties at an interface. Consistent numerical estimations for different body forces such as interfacial (including Marangoni), gravity and electromagnetic forces are discussed. Then, it is shown that the standard pressure-velocity coupling scheme for collocated algorithms is not sufficient for multiphase flows, and therefore a new pressure-velocity coupling is devised and tested for both single and two-phase flows. Finally, to advect the level set function, a cost effective fifth-order WENO method is developed. These formulations are accurate and efficient both for uniform and non-uniform meshes. Several test cases are presented and compared with a standard implementation of body forces to demonstrate the efficiency of the proposed algorithm.
机译：讨论了在两相流模拟中施加体力的数值方法。提出了数值方案，以避免由于力的不一致实施而导致的不正确的解决方案。首先，将动量方程式离散化，以便它们准确地适应界面处流体特性的不连续性。讨论了不同体力（例如界面（包括Marangoni），重力和电磁力）的一致数值估计。然后，表明用于并置算法的标准压力-速度耦合方案不足以用于多相流，因此，针对单相和两相流设计并测试了新的压力-速度耦合。最后，为了改善水平集功能，开发了一种经济高效的五阶WENO方法。这些公式对于均匀和不均匀的网格都是准确而有效的。提出了几个测试用例，并将它们与身体力的标准实现进行了比较，以证明所提出算法的效率。

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