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arXiv 2108.00901physics.flu-dynphysics.comp-ph
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基于光滑粒子流体动力学方法的多相流模拟

Multiphase flows simulation with the Smoothed Particle Hydrodynamics method

Carlos E. Alvarado-Rodriguez, Jaime Klapp, J. M. Dominguez, A. R. Uribe-Ramirez, J. J. Ramirez-Minguela, M. Gomez-Gesteira

摘要:

这项工作提出了一个新的多相SPH模型,包括移位算法和可变平滑长度的形式主义,以模拟多相流的准确性和适当的相间管理。该实现在DualSPHysics代码中进行,并针对不同的规范实验进行了验证,例如单相和多相Poiffille和Couette测试用例。该方法是准确的,即使对于两相模拟的多相情况。移位算法和可变平滑长度的形式主义已被应用在多相SPH模型,以改善在界面处的数值结果,即使它是高度变形和非线性效应变得重要。在验证测试中获得的精度和良好的界面定义的不稳定的情况下,表明一个重要的改善单相和多相模型的数值结果相比,移位算法和可变平滑长度形式主义不适用。

英文摘要:

This work presents a new multiphase SPH model that includes the shifting algorithm and a variable smoothing length formalism to simulate multi-phase flows with accuracy and proper interphase management. The implementation was performed in the DualSPHysics code and validated for different canonical experiments, such as the single-phase and multiphase Poiseuille and Couette test cases. The method is accurate even for the multiphase case for which two phases are simulated. The shifting algorithm and the variable smoothing length formalism has been applied in the multiphase SPH model to improve the numerical results at the interphase even when it is highly deformed and non-linear effects become important. The obtained accuracy in the validation tests and the good interphase definition in the instability cases indicate an important improvement in the numerical results compared with single-phase and multiphase models where the shifting algorithm and the variable smoothing length formalism are not applied.

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