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Numerical simulation of convection and heat transfer in water absorbing solar radiation

Published online by Cambridge University Press:  02 November 2000

YU. G. VEREVOCHKIN  and
S. A. STARTSEV
YU. G. VEREVOCHKIN
Affiliation:
Moscow State University for Geodesy and Cartography, Gorokhovskii 4, Moscow 103064, Russia
S. A. STARTSEV
Affiliation:
Physical Lebedev Institute, Neutron Physics Department, Leninskii 53, Moscow 117924, Russia
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Abstract

Thermal convection in a horizontal water layer being cooled from above and absorbing solar radiation is simulated numerically at the Prandtl number Pr = 7. Three different regimes arising are investigated here. The first is characterized by intermittent convection, the second by steady-state convection, and the third is convection free. The transitions occur at different values of J0/Q, the ratio of downward solar-radiation flux just below the surface to heat flux through the interface (assumed to be constant), but at almost the same Rayleigh number. The generalized heat-conduction law is found to be valid.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 421 , 25 October 2000 , pp. 293 - 305
Copyright
© 2000 Cambridge University Press

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