Abstract In this paper the onset condition of convective motions is analysed for unsteady (periodic) microgravity environment (g-jitter). The method developed in a previous work by the authors is applied to the case of homogeneous fluid layer confined in a long vertical cylinder submitted to an adverse axial temperature gradient. The residual gravity is assumed to be a combination of sinusoidal oscillations, around a non-zero mean value and periodic fluctuations (peaks) of small amplitudes. The critical conditions are determined for two different wall conductances (perfectly conducting and insulating wall), and the effect of the Prandtl number (0.01<Pr<100) is emphasized for a large range of modulation frequencies from 0 to 1Khz.
Natural convection for supercritical conditions in oscillatory microgravity environment (g-jitter)
Advances in Space Research ; 6 , 5 ; 45-50
1986-01-01
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
British Library Conference Proceedings | 1999
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