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A question about Jasak's Phd thesis

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Old   May 23, 2013, 23:51
Default A question about Jasak's Phd thesis
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Dongyue Li
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Hi guys,

In Jasak's thesis Page 144.It says: (see the image equation 1 2 3).I dont know how can I get equation 3 from equation 2.
AFAIK,in SIMPLE algorithm,I can get equations similarly(from eq.4 to eq.5).So back to Jasak's thesis , should it be equation 6?Where is the diffusion term in his thesis?

Thanks in advance.
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Old   May 24, 2013, 07:40
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Paulo Vatavuk
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Hi Forrest,
I think that what Dr. Jasak means is that the convection term can be calculated from the sum of the flow times velocity at the faces, and that will result in a contribution to ap and the an's, how this contribution will be effectively calculated depends on the convection scheme that is used.
Best Regards,
Paulo
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Old   May 26, 2013, 23:19
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Dongyue Li
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Quote:
Originally Posted by vatavuk View Post
Hi Forrest,
I think that what Dr. Jasak means is that the convection term can be calculated from the sum of the flow times velocity at the faces, and that will result in a contribution to ap and the an's, how this contribution will be effectively calculated depends on the convection scheme that is used.
Best Regards,
Paulo
Hi Paulo,

Thanks for your answer,but Im still confused.I write it in this IMAGE.In the last equation.There is no diffusive term.Please help me to check it out.Thanks!!!
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Old   May 27, 2013, 06:36
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Paulo Vatavuk
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Hi Forrest,
The diffusive term certainly have an influence that must be included in ap and the an's. The ap and the an's from equation 3 of your first post are not the same as the ones in the third eq of your second post. The equations 1, 2 and 3 of your first post are for an hypothetical situation for steady flow without diffusion and other sources.
Best Regards,
Paulo

Last edited by vatavuk; May 28, 2013 at 06:17. Reason: small typos
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