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RESEARCH PAPER

Numerical Analysis of Natural Convection and Mixing in Two-Fluid Stratified Pools With Internal Heat Sources

[+] Author and Article Information
A. A. Gubaidullin, B. R. Sehgal

Division of Nuclear Power Safety, Royal Institute of Technology (KTH), Drottning Kristinas väg 33 A, 100 44 Stockholm, Sweden

J. Heat Transfer 126(4), 600-610 (Apr 23, 2004) (11 pages) doi:10.1115/1.1777578 History: Received June 30, 2003; Revised April 23, 2004
Copyright © 2004 by ASME
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References

Figures

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Problem formulation and boundary conditions employed in CFD simulations
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Variation of the average Nusselt number with the Rayleigh number for a uniform pool
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The mean Nusselt number as a function of the Rayleigh number for (a) L12=4:22, Pr=6.5, Qv,1=Qv,2; (b) L12=8:18, Pr=6.5, Qv,1=Qv,2
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Normalized with Tmax isotherm patterns in case of (a) stratified immiscible fluids; (b) stratified miscible fluids (Ra=1.3⋅1010,Ra2=2⋅109,L12=8:18,Qv,1=Qv,2); (c) one fluid
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Variation of the average Nusselt number over the side wall (Ra=2⋅109, Pr=6.5, L12=8:18): (a) heat generation in both layers; (b) with and without heat generation in the upper layer
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The mean Nusselt number as a function of the Rayleigh number for (a) L12=4:22,Qv,1=Qv,2; (b) L12=8:18,Qv,1=Qv,2
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The mean Nusselt number as a function of the Rayleigh number for (a) L12=4:26,Qv,1=0; (b) L12=6:26,Qv,1=0
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Time average centerline temperature distributions for (a) L12=4:22,Qv,1=Qv,2; (b) L12=8:18,Qv,1=Qv,2
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Time average centerline temperature distributions for (a) L12=4:26,Qv,1=0; (b) L12=6:26,Qv,1=0
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Effect of upper layer physical properties on Q12 (Qv,1=Qv,2)
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Concentration (left-hand column) and temperature (right-hand column) fields for Ra=1.3⋅109Q=2.33⋅10−2 (a) Foc=8.3⋅10−4,Smax=1.0; (b) Foc=10⋅10−4,Smax=0.99; (c) Foc=11.5⋅10−4,Smax=0.98; (d) Foc=12.8⋅10−4,Smax=0.96; (e) Foc=14.2⋅10−4,Smax=0.94
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Transient average Nusselt numbers for Ra=1.3⋅109Q=1.16⋅10−2
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Computational domain of semicircular cavity for (a) immiscible layers (L12=6:26); (b) miscible layers (L12=8:18)

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