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A Study on the Kelvin-Helmholtz Instability Using Two Different Computational Fluid Dynamics Methods
Ist Teil von
The journal of computational multiphase flows (Online), 2010-03, Vol.2 (1), p.33-45
Ort / Verlag
London, England: SAGE Publications
Erscheinungsjahr
2010
Link zum Volltext
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
The two-dimensional Kelvin-Helmholtz instability which arises in two immiscible co-currently moving horizontal liquid layers is studied numerically. Two different methods for capturing the free interface movement are applied, namely the volume-of-fluid method and the level-set method. Both methods are very popular and available within commercial computational fluid dynamics tools. The wave is initialized using two different perturbations implemented into the model. As a case study, a system comprising a toluene layer and an aqueous layer is chosen. Numerical results obtained by both methods are in a good agreement with the linear stability theory for small wave amplitudes. The application of both methods is compared and their advantages and drawbacks are highlighted.