The effect of vibrations on heterogeneous fluids: Some studies in weightlessness |
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| Institution: | 1. School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore;2. Department of Materials Science and Engineering, University of North Texas, Denton, TX, 76207, USA;3. Center for Agile and Adaptive Manufacturing (CAAAM), University of North Texas, Denton, TX, 76207, USA;4. CNRS, Univ. Bordeaux, Bordeaux INP, ICMCB, UMR 5026, 33600 Pessac, France;1. Department of Materials Science & Engineering, University of North Texas, Denton, TX 76207, United States;2. Center for Agile and Adaptive Additive Manufacturing, University of North Texas, Denton, TX 76207, United States;4. MRL Materials Resources LLC, 123 Fairground Rd. Twp, Xenia, OH 45385, United States;5. University Bordeaux, CNRS, Bordeaux INP, ICMCB, UMR 5026, Pessac 33600, France |
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| Abstract: | Under weightlessness, the effect of harmonic vibrations can easily induce average motions in fluids with density inhomogeneities. We will consider more particularly pure fluids near their gas–liquid critical point, where the temperature variation of all important parameters (e.g. interfacial tension, density difference) follows universal, scaling laws. We will thus study, below the critical point, the ordering of the gas–liquid interfaces (at equilibrium and during the phase separation) and, above the critical point, some thermovibrational instabilities. These studies have been performed in the Russian MIR station and in the MiniTexus and Maxus rockets of ESA and under magnetic compensation of gravity on earth. |
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