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help in using permeability coefficeint

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Old   February 29, 2004, 06:02
Default help in using permeability coefficeint
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michele
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In order to finalize my last test at university of florence as mechanical engineer, i'd like help for the following scope: simulation of a vacuum steam condenser consisting of A-roof finned boundle by using Star-CD. My question is how to simulate a finned tube bank airside pressure drop as calculated by Robinson and Briggs formula. In particular my interest is in finding, in the right way, alpha and beta coefficient for Star-CD.

yours friendly, Michele
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Old   March 5, 2004, 09:27
Default Re: help in using permeability coefficeint
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isidro
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hi, this is what I used to calculate the pressure drop through a porous medium: dP/L=alpha*v^2+beta*v, L being the thickness of the porous region. my advise is for you to get some experimental data and try to curvefit this pressure drop using this formula. good luck, isidro
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Old   March 27, 2004, 12:34
Default Re: help in using permeability coefficeint
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michele
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hi,thanking for your indication.i have found the following: dP/L=alpha*v^2+beta*v= 5,6. is in your opinion this result acceptable according to your experience? yours friendly michele
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