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Role of interfacial properties on the motion and deformation of capsules in shear flow

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  • Barthés-Biesel, D.

Abstract

The influence of interfacial properties on the dynamics of a capsule freely suspended in viscous liquid subjected to flow is assessed. First, the case of a liquid-liquid interface considered: experimental evidence and theoretical models show that the drop deformat depends on the type of flow, the internal to external viscosity ratio and the capillary number which measures the ratio between surface tension and viscous forces. Burst of the drop predicted to occur when the normal stress equilibrium cannot be satisfied everywhere on interface. Next, we consider the case of capsules, which are liquid drops enclosed by a so depormable interface. From experiment and theoretical models, they are known to deform and to burst in some cases. Their motion depends on essentially the same parameters as liquid drops, but different interfacial constitutive laws lead to different types of deformation and motion.

Suggested Citation

  • Barthés-Biesel, D., 1991. "Role of interfacial properties on the motion and deformation of capsules in shear flow," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 172(1), pages 103-124.
    • Handle: RePEc:eee:phsmap:v:172:y:1991:i:1:p:103-124
    DOI: 10.1016/0378-4371(91)90314-3
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    1. Trechter, David D. & Meiselman, Deborah, 1985. "FmHA LENDING IN A PERIOD OF FINANCIAL STRESS: AN EXAMINATION OF FARMER PROGRAM LENDING DURING THE 1980s," 1985 Regional Committee NC-161, October 9-10, 1985, St. Louis, Missouri 140943, Regional Research Committee NC-1014: Agricultural and Rural Finance Markets in Transition.
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