# Energy source modeling

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September 23, 2009, 00:43
Energy source modeling
#1
New Member

Shahid Parvez
Join Date: Jul 2009
Location: Pakistan
Posts: 25
Rep Power: 8
Hi
I am trying to model an energy source on a plate as shown attached.
Coordinate (xy-plane) is on the Plate surface and I want to apply an energy of 1e5[w/m^3]. The shape of the energy source is circular with diameter 1mm.
I used step function in CEL to get the required circular shape of dia 1mm as:

1e5[w/m^3]*step((1.5[mm]-sqrt(x^2+y^2))/1[mm])

This gives energy source right on the surface of the plate.
But the source is 2mm above the plate surface (along z-axis).
Please advice how to shift this source 2mm above the plate surface in z-direction.

Regards
Attached Images
 heatsource.JPG (11.1 KB, 11 views)

 September 23, 2009, 02:45 #2 Senior Member     George Join Date: Mar 2009 Location: Birmingham, UK Posts: 257 Rep Power: 9 do you have any nodes there? __________________ Top 4 tips 1. Knowledge is everything and Ignorance is dangerous. 2. Understand your limitations and try to eliminate them. 3. Get yerself a bike and hoon the chuffer. You will soon learn why dogs like to hang their heads out the car window. 4. Please before asking any questions on how to run simulations in CFX, go though all the tutorials

 September 23, 2009, 07:36 #3 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,672 Rep Power: 84 2D sources need to be on some form of boundary condition. 3D sources need to be applied to a volume. Either you have to put a boundary condition there to apply the source to or specify a volume to apply the source. In this case it looks best to specify a thin circular region and use a 3D source in a subdomain.

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