Residual-based variational multiscale simulation of free surface flows
Residual-based variational multiscale simulation of free surface flows
复制标题
基于残差的自由表面流变分多尺度模拟
DOI：
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发表时间：
2010
期刊：
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通讯作者：
A. Coutinho
中科院分区：
文献类型：
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作者：
E. Lins;R. Elias;F. Rochinha;A. Coutinho
在这项工作中，我们应用基于残差的变分多尺度方法（RB-VMS）的流体体积（VOF）制定的自由表面流动。使用这种技术，我们能够解决这样的问题，在大涡模拟框架。这是我们的Navier-Stokes求解器的自然扩展，它使用RB-VMS有限元公式，基于边缘的数据结构，自适应时间步长控制，不精确牛顿求解器，并支持多种并行编程模式。VOF界面捕获变量平流使用计算的粗和细尺度速度场。因此，RB-VMS技术可以很容易地应用到自由表面求解器上的实施进行微小的修改。我们应用这种技术来解决两个问题，可用的数据表明复杂的自由表面行为。结果与数值和实验数据进行了比较，表明本配方可以实现良好的精度与计算效率的影响较小。
In this work we apply the residual-based variational multiscale method (RB-VMS) to the volume-of-fluid (VOF) formulation of free-surface flows. Using this technique we are able to solve such problems in a Large Eddy Simulation framework. This is a natural extension of our Navier–Stokes solver, which uses the RB-VMS finite element formulation, edge-based data structures, adaptive time step control, inexact Newton solvers and supports several parallel programming paradigms. The VOF interface capturing variable is advected using the computed coarse and fine scales velocity field. Thus, the RB-VMS technique can be readily applied to the free-surface solver with minor modifications on the implementation. We apply this technique to the solution of two problems where available data indicate complex free-surface behavior. Results are compared with numerical and experimental data and show that the present formulation can achieve good accuracy with minor impacts on computational efficiency.