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When giant vesicles mimic red blood cell's dynamics: swinging of two-phase vesicles in shear flow

Abstract : Red blood cells under shear flow present a specific swinging motion superimposed to a fluid-like tanktreading motion. Swinging is hypothesized to originate from periodic storage of shear energy in the cell membrane. Here we designed giant unilamellar vesicles with two lipid phases separated by a contact line, which swing and tanktread like red cells. We propose a model that quantitatively fits our data, finds the value of the contact-line tension and shows that swinging is due to the storage of elastic energy associated with the periodic modulation of the contact-line length during tanktreading.
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https://hal.archives-ouvertes.fr/hal-01957925
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Submitted on : Monday, December 17, 2018 - 3:52:12 PM
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Simon Tusch, Etienne Loiseau, Al-Hair Al-Halifa, Kamel Khelloufi, Emmanuèle Helfer, et al.. When giant vesicles mimic red blood cell's dynamics: swinging of two-phase vesicles in shear flow. Physical Review Fluids, American Physical Society, 2018, 3 (12), ⟨10.1103/PhysRevFluids.3.123605⟩. ⟨hal-01957925⟩

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