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On spurious velocities in incompressible flow problems with interfaces

โœ Scribed by Sashikumaar Ganesan; Gunar Matthies; Lutz Tobiska

Book ID
104013326
Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
405 KB
Volume
196
Category
Article
ISSN
0045-7825

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โœฆ Synopsis

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.

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