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Numerical investigation of oscillatory thermocapillary flows under zero gravity in a circular liquid film with concave free surfaces
Numerical investigation of oscillatory thermocapillary flows under zero gravity in a circular liquid film with concave free surfaces
- Source :
- Physics of Fluids. 28:032106
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
Abstract
- NASA astronaut Pettit has conducted thermocapillary flow experiments in water films suspended in a solid ring onboard the International Space Station (ISS) in 2003 and 2011. In one of these experiments, an oscillatory thermocapillary flow was observed. The developed flow broke its symmetry along the centerline of the film. To the best of our knowledge, there are no studies on such oscillatory thermocapillary flows in thin films, and the flow-mechanism giving rise to such oscillatory flows is also not well understood. In order to shed light on the subject, we have carried out a numerical simulation study. The simulation results have shown that the water film geometry (film surface shape; being concave) is an important parameter and give rise to three oscillatory flow structures in the film, namely, a hydrothermal wave developing near the heated section, a symmetric oscillatory flow due to temperature variations, and a symmetry breaking flow due to the hydrodynamic instability along the free boundary layer ...
- Subjects :
- Fluid Flow and Transfer Processes
Physics
Mechanical Engineering
Computational Mechanics
02 engineering and technology
Mechanics
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Instability
Symmetry (physics)
010305 fluids & plasmas
Open-channel flow
Physics::Fluid Dynamics
Boundary layer
Classical mechanics
Flow (mathematics)
Mechanics of Materials
0103 physical sciences
Zero gravity
Two-phase flow
Symmetry breaking
0210 nano-technology
Subjects
Details
- ISSN :
- 10897666 and 10706631
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Physics of Fluids
- Accession number :
- edsair.doi...........e3d31ffbbcec8a280cad2f8c8ddb041f
- Full Text :
- https://doi.org/10.1063/1.4943246