On diffuse interface modeling and simulation of surfactants in two-phase fluid flow
2013 (English)In: Communications in Computational Physics, ISSN 1815-2406, Vol. 14, no 4, 879-915 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2013. Vol. 14, no 4, 879-915 p.
Cahn-Hilliard equation, Ginzburg-Landau free energy, Phase-field model, Surface active agent, Well-posedness
Computational Mathematics Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-126045DOI: 10.4208/cicp.120712.281212aISI: 000322071000002ScopusID: 2-s2.0-84877707309OAI: oai:DiVA.org:kth-126045DiVA: diva2:641822
FunderSwedish Research CouncilKnut and Alice Wallenberg Foundation
QC 201308192013-08-192013-08-192013-08-23Bibliographically approved