The mechanics of particle accumulation structures in thermocapillary flows

. The motion of small particles suspended in a cylindrical thermocapillary liquid bridge is considered. Owing to geometry and surface stresses the streamlines gather near the cylindrical free surface and provoke particle–free-surface collisions. We show numerically that tracers which are perfect but...

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Bibliographic Details
Published in:The European physical journal. ST, Special topics Special topics, 2011-02, Vol.192 (1), p.3-12
Main Authors: Kuhlmann, H.C., Hofmann, E.
Format: Article
Language:English
Subjects:
Atomic
Attraction
Classical and Continuum Physics
Collisions
Condensed Matter Physics
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Fluid surfaces and fluid-fluid interfaces
Liquid bridges
Materials Science
Mathematical analysis
Mathematical models
Measurement Science and Instrumentation
Molecular
Optical and Plasma Physics
Physics
Physics and Astronomy
Regular Article
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Topology
Tracers
Trajectories
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Summary:. The motion of small particles suspended in a cylindrical thermocapillary liquid bridge is considered. Owing to geometry and surface stresses the streamlines gather near the cylindrical free surface and provoke particle–free-surface collisions. We show numerically that tracers which are perfect but of finite size can accumulate on closed trajectories. A simple model is proposed to explain the attraction of particles to the closed trajectory based on the flow topology in the vicinity of a closed streamline which comes sufficiently close to the free surface and on particle–free-surface collisions which transfer particles among different streamlines.
ISSN:1951-6355
1951-6401
DOI:10.1140/epjst/e2011-01355-9