Existence Conditions and Formation Process of Second Type of Spiral Loop Particle Accumulation Structure (SL-2 PAS) in Half-zone Liquid Bridge
| Autor: | Ichiro Ueno, Masakazu Gotoda, Aro Toyama, Toshihiro Kaneko |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Infrared Applied Mathematics General Engineering General Physics and Astronomy Marangoni number Type (model theory) Rotating reference frame 01 natural sciences Aspect ratio (image) Molecular physics Hydrothermal circulation 010305 fluids & plasmas Optics Modeling and Simulation 0103 physical sciences Particle 010306 general physics business Intensity (heat transfer) |
| Zdroj: | Microgravity Science and Technology. 29:263-274 |
| ISSN: | 1875-0494 0938-0108 |
| DOI: | 10.1007/s12217-017-9544-y |
| Popis: | We focus on unique phenomena known as particle accumulation structure (PAS), especially on the conditions of the existence for second-type spiral loop PAS (SL-2 PAS) and on their formation processes under normal gravity. We investigate the existence conditions as functions the aspect ratio of the liquid bridge and the Marangoni number, the intensity of the thermocapillary effect. We discuss the differences among SL-1 PAS, SL-2 PAS and the flow field without PAS through observation of the solid-like structures of the PAS in a rotating frame of reference with the hydrothermal wave, and through monitoring of the surface temperature by infrared camera. We evaluate the formation time of PAS by employing a modified accumulation measure by considering the effect of the particles’ size. |
| Databáze: | OpenAIRE |
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