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-   -   add source terms in CFX (http://www.cfd-online.com/Forums/cfx/115871-add-source-terms-cfx.html)

radouane_bne April 8, 2013 14:53

add source terms in CFX
 
Hi there

I have got a problem about adding folder of source terms in CFX and hope someone can help me figure it out.

I want to modelize a fan by adding sources termes (Energy, X-momentum, Y-momentum and Z-momentum) in the leading edge's plane.

I have 4 folders momentumX.csv, momentumY.csv,momentumZ.csv,Energysources.csv when I have for each coordinate a value, it looks like :

Quote:

[Name]
Xmomentum

[Spatial Fields]
x, y, z

[Data]
x [ m ],y [ m ],z [ m ],x_momentum [ Pa m^2 ]
0.83,-0.0948,-0.005101,-0.045723873
0.83,-0.107,-0.0061602,0.8562502378
0.83,-0.119,-0.00718002,1.548711104
0.83,-0.128,-0.00794001,1.093336433
0.83,-0.131,-0.0081898,1.7390343124
0.83,-0.143,-0.009199997,3.33427554
0.83,-0.156,-0.0104,4.0889305808483
0.83,-0.17,-0.0116,4.64777404898814
0.83,-0.183,-0.0128,5.3140303878275
0.83,-0.196,-0.014,5.52401614889637
0.83,-0.209,-0.0152,5.8011585140083
0.83,-0.223,-0.0164,6.3672409032532
0.83,-0.236,-0.0175999,5.8485295588
0.83,-0.244,-0.0183,3.2329651066391
0.83,-0.249,-0.0187,1.9830417618841
0.83,-0.0941,-0.0127,-0.03660571174
0.83,-0.106,-0.0147,0.8510620826499
0.83,-0.118,-0.0167,1.5600977683659
0.83,-0.127,-0.0183,1.1141691036813
My question is how to insert those folders ? CFX offer the possibility to add one source point, but in the case of my projet I have more than 1000 points.

My geometry is :

http://i74.servimg.com/u/f74/10/09/23/89/captur10.jpg


Any comments are welcome.

Best regards!

ghorrocks April 8, 2013 18:32

Use a volume source term for this application. Define a volume in your mesh and assign a source term to it. The source term can vary as a function of XYZ so this will do what you need.

radouane_bne April 11, 2013 18:37

Thank you a lot for your reply.

As you said, I create a volume in my mesh as shown in this picture :
http://i74.servimg.com/u/f74/10/09/23/89/captur11.jpg

but now in CFX, I don't see how to insert the folders like I've shown in my first message. I only find the option to insert a X,Y,Z momentum component (only one value) or an expression which is not the case of my problem. I'm wondering if it's possible to initilaze by a profil data like the inlet boundary condition cvs's folder in the tutorial (Chapter 11: Flow Through a Butterfly Valve).

thanks in advance :)

Lance April 12, 2013 08:45

Im pretty sure you can include profile data in the input for the momentum components. Initialize your .csv file, and enter something like Xmomentum.x_momentum(x,y,z) for the X component (I used the names from your example).


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