Numerical Computation For The Transient
Formation Process Of Double Diffusive
Natural Convection Of High And Low
Prandtl Number Fluids
Author(s)
K. Kamakura & H. Ozoe
Abstract
Numerical computation for the transient
formation process of double diffusive
natural convection of high and low
Prandtl number fluids
K. Kamakura" & H. Ozoe&
"Toyama National College of Technology,
13 Hongo-machi, Toyama 939, Japan
^Institute of Advanced Material Study, Kyushu
University, 6-1 Kasuga Koen, Kasuga 816, Japan
ABSTRACT
The numerical computations of double diffusive natural convection by lateral
heating and cooling were carried out for the system with a linear concentration
gradient. Computations with a Galerkin finite element method were done for
the Prandtl number Pr=0.01 or 6, the Rayleigh numbers Ra=W*, l(f or 10^.
the Lewis number Le=100, the aspect ratio A=4, the buoyancy ratio #=10. At
Pr=6 and Ra-l(^ the stable multi-layered convection was formed. At
Pr=0.01 and Ra=W* or 10^ the whole system with a linear concentration
gradient started to roll with the lateral heating and cooling. Then two round
roll cells with convection appeared near the top and
Keywords
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