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首页> 外文期刊>Journal of Computational Physics >A subgrid computation of the curvature by a particle/level-set method. Application to a front-tracking/ghost-fluid method for incompressible flows
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A subgrid computation of the curvature by a particle/level-set method. Application to a front-tracking/ghost-fluid method for incompressible flows

机译：通过粒子/水平集方法对曲率进行子网格计算。在不可压缩流的前跟踪/鬼流体方法中的应用

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摘要

A particle/level-set method is developed to capture the interface between two immiscible phases. No redistance equation is used for the level-set function which is built from an accurate cubic spline interpolation of the markers describing the interface. Mass losses which usually appear with level-set functions are drastically reduced. Interface coupling with the incompressible momentum equation is taken into account thanks to the ghost-fluid method. Indeed, the particles allow an accurate computation of the local interfacial curvatures, and the capillary part of the pressure jump computed across the interface is more accurately evaluated. Results on static drop show a large decrease of spurious currents compared to other methods. Scalar advection validations and convergence studies are carried out as well as tough test-cases involving large density ratios (typically air/water). A better agreement with literature results is shown compared to classical approaches.
机译：开发了一种粒子/能级集方法来捕获两个不混溶相之间的界面。水平设置功能没有使用冗余方程，该方程是根据描述界面的标记的精确三次样条插值建立的。通常会降低水平设置功能通常会出现的质量损失。由于采用了鬼流体方法，因此考虑了与不可压缩动量方程的界面耦合。实际上，这些颗粒可以精确计算局部界面曲率，并且可以更准确地评估跨界面计算的压力跳跃的毛细作用。与其他方法相比，静态压降的结果表明杂散电流大大降低。进行标量对流验证和收敛研究，以及涉及大密度比（通常是空气/水）的艰难测试案例。与经典方法相比，显示出与文献结果更好的一致性。

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