Physics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..24.1403l&link_type=abstract
Advances in Space Research, Volume 24, Issue 10, p. 1403-1407.
Physics
1
Scientific paper
Experimental results are presented on oscillatory convection of different fluids (mercury, Pr= 0.025; water, Pr= 7; 10 cS silicone oil, Pr= 120; 100 cS silicone oil, Pr= 1010; 1000 cS silicone oil, Pr= 9200), induced by coupling of natural convection with crystal rotation in a Czochralski crystal growing configuration. Thermal waves traveling in the azimuthal direction are generated when the rotation rate of disk as a model crystal exceeds a certain critical value. These thermal waves disappear when the rotation rate increases sufficiently high so that the flow in a fixed crucible is dominated by rotation-driven convection. Three distinct flow regimes are shown to exist for a wide span of Prandtl numbers from 10-2 to 103, which are buoyancy-driven flow, baroclinic wave flow, and rotation-driven flow. It is shown that these flow characteristics strongly depend on the Prandtl number
Chun Ch.-H.
Lee Young Sam
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