Hindered and Enhanced Coalescence of Drops in Stokes Flows

M. B. Nemer, X. Chen, D. H. Papadopoulos, J. Bławzdziewicz, M. Loewenberg

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The axisymmetric near-contact motion and enhanced coalescence of two drops under the action of stokes flow was investigated. Coalescence relies on an agent to push drops together as well as short-range molecular forces that rupture the thin liquid film that separates drop interfaces prior to influence. It was shown that the drainage of the thin fluid film separating the drops was qualitatively affected due to the hydrodynamic stresses in the near-contact region that are associated with the outer flow. The results show that the tangential stress associate with flow far from the near-contact region hinders film drainage when it acts radially inward, and enhances drainage when it acts radially outward.

Original languageEnglish
Article number114501
Pages (from-to)114501-1-114501-4
JournalPhysical Review Letters
Issue number11
StatePublished - Mar 19 2004


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