Abstract
iments performed in a test cell with aspect ratio LIH =16 have shown that steady thermal distortions arise in the presence of relatively large g-jitter at relatively high frequencies. These distortions depend on the value of the vibrational Rayleigh number (proportional to the temperature difference and to the velocity of the g-jitter oscillations). An experimental proposal is being considered for the International Space Station, where the steady residual gravity is reduced by several orders of magnitude, compared with Earth conditions, so that a fluid cell with unitary aspect ratio could be used and relatively small g-jitter will be sufficient to induce measurable thermofluiddynamic distortions.
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