Abstract An interface capturing scheme called modified switching technique for advection and capturing of surfaces (MSTACS) has been proposed. The proposed interface capturing scheme utilizes a basic switching technique for advection and capturing of surfaces (STACS) for solution of the volume fraction advection equation. MSTACS has been compared against three interface capturing schemes with the help of various two and three dimensional test cases. It is proved that MSTACS is able to capture sharp interfaces with minimum numerical diffusion over a wide range of Courant numbers. Further, the interface capturing capability of MSTACS is demonstrated by coupling it with the Navier-Stokes equations (NSE) to simulate three dimensional flow problems such as Rayleigh-Taylor instability and dam break with an obstacle.

中文翻译：

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一种用于表面对流和捕获的改进切换技术

摘要 提出了一种界面捕获方案，称为表面对流和捕获的改进切换技术（MSTACS）。所提出的界面捕获方案利用基本的对流和表面捕获切换技术 (STACS) 来求解体积分数对流方程。在各种二维和三维测试用例的帮助下，MSTACS 已与三种界面捕获方案进行了比较。事实证明，MSTACS 能够在很宽的柯朗数范围内以最小的数值扩散捕获尖锐的界面。此外，通过将 MSTACS 与 Navier-Stokes 方程 (NSE) 耦合来模拟三维流动问题，例如瑞利-泰勒不稳定性和障碍物破坏，证明了 MSTACS 的界面捕获能力。