Laminar natural convection between vertical isothermal heated plates with different temperatures |
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Authors: | V I Terekhov Ali L Ekaid |
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Institution: | 1.Kutateladze Institute of Thermophysics, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;2.Novosibirsk State Technical University,Novosibirsk,Russia |
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Abstract: | Numerical investigation of laminar free convection heat transfer in the vertical parallel plate channel with asymmetric heating
is presented. Both inlet and exit effects are included into the analysis. A numerical solution is obtained for a Prandtl number
of 0.71 and for modified Rayleigh number `(Ra)]\overline {Ra} = 10−1 ÷ 105, and varying heating ratio TR = 0 ÷ 1 and aspect ratio A = 10. Fully elliptic Navier-Stokes and energy equations are solved using the finite volume techniques with staggered grid
arrangements. The obtained results show a strong influence of the temperature ratio on local and average heat transfer coefficient
on the hot and cold plates. With reduction of TR the heat transfer parameter on the hot wall grows, and on the cold one, on the contrary, it decreases. As a result, the total
heat exchange from two plates depends poorly on the parameter TR. |
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Keywords: | |
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