buoyancy term discretisation

June 6, 2000, 07:07

Dear Friends,

I would like to know as how to discretise the buoyancy

term, using simpler algorithm, that occur in the

momentum equation. I am not able to get a clear

picture from the book of Patankar.

June 7, 2000, 07:54

One possibility is to use the Boussinesq-Approximation if your temperatur variation is not big. An other way is to consider the $\rho* g$ Term as a source term, that would give you (after the Integration $\Delta V * \rho* g$. Try to get the book from Peric, Ferziner "Computational Fluid Dynamics" or something like that. Is realy a very good book. The Patankar is for beginners.

best regards

Jiannis Dotsikas

June 6, 2000, 07:07	buoyancy term discretisation	#1
sundar Guest Posts: n/a	Dear Friends, I would like to know as how to discretise the buoyancy term, using simpler algorithm, that occur in the momentum equation. I am not able to get a clear picture from the book of Patankar.

June 7, 2000, 07:54	Re: buoyancy term discretisation	#2
I. Dotsikas Guest Posts: n/a	One possibility is to use the Boussinesq-Approximation if your temperatur variation is not big. An other way is to consider the $\rho* g$ Term as a source term, that would give you (after the Integration $\Delta V * \rho* g$. Try to get the book from Peric, Ferziner "Computational Fluid Dynamics" or something like that. Is realy a very good book. The Patankar is for beginners. best regards Jiannis Dotsikas

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