The motion of a droplet subjected to linear shear flow including the presence of a plane wall
| Autor: | Evert-Jan Nijhof, Wim S. J. Uijttewaal |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Physics
Deformation (mechanics) Mechanical Engineering media_common.quotation_subject Flow (psychology) Mechanics Stokes flow Condensed Matter Physics Inertia Capillary number Physics::Fluid Dynamics Viscosity Circulation (fluid dynamics) Classical mechanics Mechanics of Materials Shear flow media_common |
| Zdroj: | Journal of Fluid Mechanics. 302:45-63 |
| ISSN: | 1469-7645 0022-1120 |
| DOI: | 10.1017/s0022112095004009 |
| Popis: | A fluid droplet subjected to shear flow deforms and rotates in the flow. In the presence of a wall the droplet migrates with respect to a material element in the undisturbed flow field. Neglecting fluid inertia, the Stokes problem for the droplet is solved using a boundary integral technique. It is shown how the time-dependent deformation, orientation, circulation and stability of a droplet are related to the capillary number and to the ratio of medium and droplet viscosity. The migration velocities are calculated in the directions parallel and perpendicular to the wall, and compared with theoretical models and experiments. The results reveal some of the shortcomings of existing models although not all discrepancies between our calculations and known experiments could be clarified. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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