On spurious velocities in incompressible flow problems with interfaces
On spurious velocities in incompressible flow problems with interfaces
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DOI：
10.1016/j.cma.2006.08.018
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发表时间：
2007-01
影响因子：
7.2
通讯作者：
Sashikumaar Ganesan;G. Matthies;L. Tobiska
中科院分区：
文献类型：
--
作者：
Sashikumaar Ganesan;G. Matthies;L. Tobiska
我们证明了在局部外力作用下不可压缩两相流的有限元计算中可能出现非物理速度。有不同的来源负责这一现象：近似的不可压缩性约束，界面，和局部外力。此外，我们证明了这种非物理速度不会随着预期的收敛阶而消失。我们评估了不同的概念，并就如何正确处理这一现象提出了建议。
We show that a non-physical velocity may appear in the finite element calculation of incompressible two-phase flows subjected to an external local force. There are different sources responsible for this phenomenon: approximation of the incompressibility constraint, the interface, and the local external force. Furthermore, we demonstrate that this non-physical velocity does not vanish with the expected order of convergence. We evaluate different concepts and give recommendations for a proper handling of this phenomenon.