Energy source modeling

shahpar73 · September 23, 2009, 01:43

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

ckleanth · September 23, 2009, 03:45

do you have any nodes there?

ghorrocks · September 23, 2009, 08:36

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.

September 23, 2009, 03:45		#2
ckleanth Senior Member George Join Date: Mar 2009 Location: Birmingham, UK Posts: 257 Rep Power: 18	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

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September 23, 2009, 08:36		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	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.