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Effect of modified gravitational acceleration (g) on Natural convection results

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Old   November 5, 2017, 09:03
Default Effect of modified gravitational acceleration (g) on Natural convection results
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vidyadhar
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Hello,

I am simulating natural convection problem in Fluent- vertical plate with fins (conjugate heat transfer problem).

To achieve different Rayleigh numbers, I am modifying acceleration due to gravity, by keeping other parameters constant.

1. How to assess the results such as Nusselt number, heat transfer rate? -when gravity is modified from "9.81". Do I have to use any multiplying factors to get the actual values which would have been obtained at the normal value of g=9.81?
2.How far this procedure gives correct results? Does the heat transfer coefficient and surface temperature of fins which were obtained with modified gravity and with g=9.81 are same (-provided Rayleigh number being the same in both cases)?


Thanks in advance,
Vidyadhar
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Old   November 5, 2017, 21:30
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Alexander
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Why do you think, that G will influence Re and Pr directly?

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Old   November 6, 2017, 00:15
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Hi,

No 'g' will not influence Re, Pr
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