Drag coefficient of a liquid domain in a two-dimensional membrane

S. Ramachandran, S. Komura, M. Imai, K. Seki

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Using a hydrodynamic theory that incorporates a momentum decay mechanism, we calculate the drag coefficient of a circular liquid domain of finite viscosity moving in a two-dimensional membrane. We derive an analytical expression for the drag coefficient which covers the whole range of domain sizes. Several limiting expressions are discussed. The obtained drag coefficient decreases as the domain viscosity becomes smaller with respect to the outer membrane viscosity. This is because the flow induced in the domain acts to transport the fluid in the surrounding matrix more efficiently.

Original languageEnglish
Pages (from-to)303-310
Number of pages8
JournalEuropean Physical Journal E
Issue number3
Publication statusPublished - 2010 Mar


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