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On diffuse interface modeling and simulation of surfactants in two-phase fluid flow
Uppsala University.
KTH.
2013 (engelsk)Inngår i: Communications in Computational Physics, ISSN 1815-2406, E-ISSN 1991-7120, Vol. 14, nr 4, s. 879-915Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

An existing phase-fieldmodel of two immiscible fluids with a single soluble surfactant present is discussed in detail. We analyze the well-posedness of the model and provide strong evidence that it is mathematically ill-posed for a large set of physically relevant parameters. As a consequence, critical modifications to the model are suggested that substantially increase the domain of validity. Carefully designed numerical simulations offer informative demonstrations as to the sharpness of our theoretical results and the qualities of the physical model. A fully coupled hydrodynamic test-case demonstrates the potential to capture also non-trivial effects on the overall flow.

sted, utgiver, år, opplag, sider
2013. Vol. 14, nr 4, s. 879-915
Emneord [en]
Cahn-Hilliard equation, Ginzburg-Landau free energy, Phase-field model, Surface active agent, Well-posedness
HSV kategori
Identifikatorer
URN: urn:nbn:se:sh:diva-30131DOI: 10.4208/cicp.120712.281212aISI: 000322071000002Scopus ID: 2-s2.0-84877707309OAI: oai:DiVA.org:sh-30131DiVA, id: diva2:932471
Forskningsfinansiär
Swedish Research CouncilKnut and Alice Wallenberg FoundationTilgjengelig fra: 2013-08-19 Laget: 2016-06-01 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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