Source within a porous domain

Hitch8 · June 29, 2010, 05:25

Hi everyone!

I would like to define an energy source term within a porous domain by reading in a csv file (x,y,z, source term [W m^-3], similar to the definition of a boundary condition by reading in a boundary profile file.

Does anyone know if this is possible and how I can do that?

Many thanks!
Philipp

ghorrocks · June 29, 2010, 07:25

Use a 3D CEL interpolation function. When you set it up in CFX-Pre it will probably be easier to use the text editor to enter the points directly from the csv file - but you will have to do a small amount of formatting, but it is not hard.

Hitch8 · July 1, 2010, 10:18

Hi Glen,
thank you again for your help!

I have still a small problem; I managed to create the User Function (H2 Source), I've imported the data points (coordinate, value) by reading in a csv. file. I have now a list of data points (about 3400, coordinates x,y,z and the corresponding value).
I tried to define an equation source [kg m^-3 s^-1] in a subdomain, but I don't know exactly what name I have to put in the field. Is it just the name of the user function (H2 Source) or is it something like H2 Source.Variable name(x,y,z)?

Regards,
Philipp

ghorrocks · July 1, 2010, 19:42

If you used a 3D interpolation function it is simply f(a,b,c), where a,b and c are the input variables - almost always x,y and z. So in your case it would be "H2 Source(x,y,z)".

Hitch8 · July 2, 2010, 04:01

Thank you very much Glen, perfect!

Regards,
Philipp

June 29, 2010, 05:25	Source within a porous domain	#1
Hitch8 New Member Philipp Join Date: Apr 2010 Posts: 27 Rep Power: 17	Hi everyone! I would like to define an energy source term within a porous domain by reading in a csv file (x,y,z, source term [W m^-3], similar to the definition of a boundary condition by reading in a boundary profile file. Does anyone know if this is possible and how I can do that? Many thanks! Philipp

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June 29, 2010, 07:25		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,001 Rep Power: 146	Use a 3D CEL interpolation function. When you set it up in CFX-Pre it will probably be easier to use the text editor to enter the points directly from the csv file - but you will have to do a small amount of formatting, but it is not hard.

July 1, 2010, 10:18		#3
Hitch8 New Member Philipp Join Date: Apr 2010 Posts: 27 Rep Power: 17	Hi Glen, thank you again for your help! I have still a small problem; I managed to create the User Function (H2 Source), I've imported the data points (coordinate, value) by reading in a csv. file. I have now a list of data points (about 3400, coordinates x,y,z and the corresponding value). I tried to define an equation source [kg m^-3 s^-1] in a subdomain, but I don't know exactly what name I have to put in the field. Is it just the name of the user function (H2 Source) or is it something like H2 Source.Variable name(x,y,z)? Regards, Philipp

July 1, 2010, 19:42		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,001 Rep Power: 146	If you used a 3D interpolation function it is simply f(a,b,c), where a,b and c are the input variables - almost always x,y and z. So in your case it would be "H2 Source(x,y,z)".

July 2, 2010, 04:01		#5
Hitch8 New Member Philipp Join Date: Apr 2010 Posts: 27 Rep Power: 17	Thank you very much Glen, perfect! Regards, Philipp