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A 3D boundary integral method for the electrohydrodynamics of surfactant-covered drops
KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. KTH, Skolan för teknikvetenskap (SCI), Matematik (Inst.).
KTH, Skolan för teknikvetenskap (SCI), Matematik (Inst.). KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW.
Northwestern Univ, Engn Sci & Appl Math, Evanston, IL 60208 USA..
2019 (engelsk)Inngår i: Journal of Computational Physics, ISSN 0021-9991, E-ISSN 1090-2716, Vol. 389, s. 111-127Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We present a highly accurate numerical method based on a boundary integral formulation and the leaky dielectric model to study the dynamics of surfactant-covered drops in the presence of an applied electric field. The method can simulate interacting 3D drops (no axisymmetric simplification) in close proximity, can consider different viscosities, is adaptive in time and able to handle substantial drop deformation. For each drop global representations of the variables based on spherical harmonics expansions are used and the spectral accuracy is achieved by designing specific numerical tools: a specialized quadrature method for the singular and nearly singular integrals that appear in the formulation, a general preconditioner for the implicit treatment of the surfactant diffusion and a reparametrization procedure able to ensure a high-quality representation of the drops also under deformation. Our numerical method is validated against theoretical, numerical and experimental results available in the literature, as well as a new second-order theory developed for a surfactant-laden drop placed in a quadrupole electric field.

sted, utgiver, år, opplag, sider
ACADEMIC PRESS INC ELSEVIER SCIENCE , 2019. Vol. 389, s. 111-127
Emneord [en]
Boundary integral method, Spherical harmonics, Stokes flow, Surfactant, Electric field, Small deformation theory
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-252584DOI: 10.1016/j.jcp.2019.03.041ISI: 000467918600006Scopus ID: 2-s2.0-85064312878OAI: oai:DiVA.org:kth-252584DiVA, id: diva2:1322851
Merknad

QC 20190611

Tilgjengelig fra: 2019-06-11 Laget: 2019-06-11 Sist oppdatert: 2019-06-11bibliografisk kontrollert

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