Experimental and theoretical investigation of thermal convection in a terrestrial model of a convection detector

Convection and heat/mass transfer processes under space flight conditions

“…5 (Sc = 10, L/H = 4) and an oscillation amplitude corresponding to g/g 0 ∼ 10 −2 at the frequency ω = 0.001 Hz. These are greater than the actual flight values but considerably smaller than the values to be found in the literature [1,[19][20][21]59]. In the instantaneous patterns of the stream function and concentration field isolines and the concentration variation on the boundary over a single oscillation period, periodically formed secondary structures, typical of this kind of flow, are visible (Fig.…”

“…For helping to found and develop this branch in the USSR, great credit must go to Academician V. S. Avduevskii 1 . In connection with this and other applications, we note the development of mass transfer models based on the compressible-gas equations with filtration of the acoustics [18], vibrational convection models (averaged flows induced by non-translational vibration [19]), numerical and experimental studies of low-frequency convection in the presence of vibration [20], the generalization of models of convection under the action of translational and non-translational vibration with account for various complex factors [21], etc.…”

“…Such an experiment was carried out onboard the "Mir" station in a thermostated vessel filled with air ("DAKON" instrument [62]). Under terrestrial conditions, further experimentation (cubic and cylindrical regions in the presence of vibration and a cylindrical region in the presence of thermal gravitational convection) and mathematical modeling [20,29,59] were performed. The instrument for measuring the convection can also operate as a "convection detector" and a microacceleration indicator.…”

“…In the two latter papers, visualization methods are also proposed. The most advanced proposals are for temperature measurements in a gas, for which there is experience of terrestrial processing and comparison of the measurements with the results of modeling under real space flight conditions [20,29,62].…”

Time-average flows in closed cavity subject to swing oscillations

“…Experiments and numerical simulations by Ivanova et al (1995) axis. Convective flows of a non-isothermal fluid in a rectangular cavity subject to low-frequency swing oscillations were studied experimentally and numerically by Bogatyrev et al (1994) for the case when the swing arm is of the same magnitude as the cavity size. The calculations are performed within the framework of nonaveraged approach using the conventional NavierStokes-Boussinesq equations.…”