A front-tracking method for viscous, incompressible, multi-fluid flows
A front-tracking method for viscous, incompressible, multi-fluid flows
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DOI：
10.1016/0021-9991(92)90307-k
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发表时间：
1992-05
影响因子：
4.1
通讯作者：
S. O. Unverdi;G. Tryggvason
中科院分区：
文献类型：
--
作者：
S. O. Unverdi;G. Tryggvason
描述了一种模拟非定常多流体流动的方法，在这种流动中，尖锐的界面或锋面将不同密度和粘度的不可压缩流体分开。流场采用定常网格上的守恒型有限差分近似离散，界面由穿过定常网格的独立的非结构化网格显式表示。由于界面不断变形，因此随着计算的进行，有必要重新构造其网格。除了保持密度和粘度分层的锐利之外，跟踪的界面还提供了一种自然的方式来包括表面张力影响。给出了气泡运动的二维和三维全数值模拟。
A method to simulate unsteady multi-fluid flows in which a sharp interface or a front separates incompressible fluids of different density and viscosity is described. The flow field is discretized by a conservative finite difference approximation on a stationary grid, and the interface is explicitly represented by a separate, unstructured grid that moves through the stationary grid. Since the interface deforms continuously, it is necessary to restructure its grid as the calculations proceed. In addition to keeping the density and viscosity stratification sharp, the tracked interface provides a natural way to include surface tension effects. Both two- and three-dimensional, full numerical simulations of bubble motion are presented.