Source terms in local coordinate frames

August 24, 2006, 21:00

Hi!

I have two subdomains where I need to apply momentum source terms in the tangential direction. These source terms are dependent on the radius and theta values in the respective subdomains.

I have defined two new cartesian coordinate frames and applied these coordinate frames to the subdomains. Then using CEL, I have defined the source terms which contain r and theta.

Does CFX calculate r and theta for each subdomain separately? It doesn't seem so, coz my source terms are calculated fine for one subdomain, but not for the other!

Help!

August 25, 2006, 10:15

Do you have a local coordinate system for each subdomain?

August 29, 2006, 02:30

Dear CF,

The CFX tutorial says source term = source coeff (U - Uspec, etc. Could you please guide me how to calculate source coefficient, Uspec, Vspec, and Wspec for an axial flow fan? I am modeling a fan in completelt enclosed cabin as momentum source.

Thanks a lot in advance,

Amod Kumar

August 24, 2006, 21:00	Source terms in local coordinate frames	#1
CF Guest Posts: n/a	Hi! I have two subdomains where I need to apply momentum source terms in the tangential direction. These source terms are dependent on the radius and theta values in the respective subdomains. I have defined two new cartesian coordinate frames and applied these coordinate frames to the subdomains. Then using CEL, I have defined the source terms which contain r and theta. Does CFX calculate r and theta for each subdomain separately? It doesn't seem so, coz my source terms are calculated fine for one subdomain, but not for the other! Help!

August 25, 2006, 10:15	Re: Source terms in local coordinate frames	#2
Robin Guest Posts: n/a	Do you have a local coordinate system for each subdomain?

August 29, 2006, 02:30	Re: Source terms in local coordinate frames	#3
Amod Kumar Guest Posts: n/a	Dear CF, The CFX tutorial says source term = source coeff (U - Uspec, etc. Could you please guide me how to calculate source coefficient, Uspec, Vspec, and Wspec for an axial flow fan? I am modeling a fan in completelt enclosed cabin as momentum source. Thanks a lot in advance, Amod Kumar

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