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首页> 外文期刊>International Journal of Multiphase Flow >A finite-volume/level-set method for simulating two-phase flows on unstructured grids
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A finite-volume/level-set method for simulating two-phase flows on unstructured grids

机译:用于模拟非结构网格上两相流的有限体积/水平集方法

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摘要

The conservative level-set method for capturing the interface between two fluids is combined with a variable density projection scheme to simulate incompressible two-phase flows on unstructured meshes. All equations are discretized by using a conservative finite-volume approximation on a collocated grid arrangement. A high order scheme based on a flux limiter formulation, is adopted for approximating the convective terms, while the diffusive fluxes are centrally differenced. Gradients are computed by the least-squares approach. Physical properties are assumed to vary smoothly in a narrow band around the interface to avoid numerical instabilities. The numerical method is validated against classical advection test and two-phase flow examples including topology changes.
机译:用于捕获两种流体之间的界面的保守的水平集方法与可变密度投影方案相结合,以模拟非结构化网格上不可压缩的两相流。通过在并置网格排列上使用保守的有限体积近似,可以离散所有方程。采用基于通量限制器公式的高阶方案来近似对流项,而扩散通量在中心上有所不同。梯度是通过最小二乘法计算的。为了避免数值不稳定,假定物理性质在界面周围的窄带内平滑变化。通过经典的对流试验和包括拓扑变化在内的两相流动实例对数值方法进行了验证。

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