Application of the Volume-of-Fluid Method to the Advection–Condensation Problem
Application of the Volume-of-Fluid Method to the Advection–Condensation Problem
复制标题
流体体积法在平流-凝结问题中的应用
DOI：
--
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
P. Smolarkiewicz
中科院分区：
文献类型：
--
作者：
L. Margolin;J. Reisner;P. Smolarkiewicz
摘要介绍了一种特殊的网格加密技术--流体体积(VOF)方法在云的数值模拟中的应用。特别是，VOF消除了大多数公认的数值困难(云-环境界面附近的虚假振荡和/或扩散)，这些困难与云边界的有限差分欧拉平流有关。从本质上讲，VOF是一种考虑物质界面输送的亚格子尺度平流参数化。VOF是一种欧拉方法，因为它不显式地跟踪材料界面。取而代之的是，它使用辅助因变量--计算单元内不相容材料的部分体积分数--重建这样的界面。VOF的一个特性对于云建模特别重要，那就是它能够通过亚网格规模的云环境界面识别单元。因此，微物理过程的相关参数可以得到一致的应用。
Abstract The authors demonstrate the application of the volume of fluid (VOF) method, a specialized grid refinement technique, to the numerical simulation of clouds. In particular, it is shown that VOF eliminates most of the well-recognized numerical difficulties (spurious oscillations and/or diffusion in vicinity of a cloud–environment interface) associated with finite-difference Eulerian advection of cloud boundaries. In essence, VOF is a subgrid-scale advection parameterization that accounts for the transport of material interfaces. VOF is an Eulerian approach, as it does not track explicitly material interfaces. Instead, it reconstructs such interfaces using auxiliary dependent variables—the partial volume fractions of immiscible materials within computational cells. A feature of VOF particularly important for cloud modeling is its ability to identify cells with a subgrid-scale cloud–environment interface. Consequently, relevant parameterizations of microphysical processes can be applied consistently ...