Different Terms in Different UDS

April 3, 2006, 14:46

Hi Everybody

I'm programing two UDS (User - Defined Scalars) and I would like to know if it is possible to have two different Unsteady Terms as well as two different Advective and Diffusivity terms (one for each scalar)and how can I specify them, for the right scalar.

Really need help. With my best regards:

Carlos V.

April 4, 2006, 05:50

In those macros FLUENT passes a variable, i, to your udf. This integer represents the uds equation. The first uds is i = 0 and the second is i = 1 and so on. Include a logical expression for i in your marco to define the correct expression for each uds.

for example

if (i == 0)

uds-0 expresseion

else if (i == 1)

uds-1 expression

April 4, 2006, 07:19

Really must thank you Aidan, I think I got it!

With my best regards:

Carlos V.

April 3, 2006, 14:46	Different Terms in Different UDS	#1
Carlos V. Guest Posts: n/a	Hi Everybody I'm programing two UDS (User - Defined Scalars) and I would like to know if it is possible to have two different Unsteady Terms as well as two different Advective and Diffusivity terms (one for each scalar)and how can I specify them, for the right scalar. Really need help. With my best regards: Carlos V.

April 4, 2006, 05:50	Re: Different Terms in Different UDS	#2
Aidan Guest Posts: n/a	In those macros FLUENT passes a variable, i, to your udf. This integer represents the uds equation. The first uds is i = 0 and the second is i = 1 and so on. Include a logical expression for i in your marco to define the correct expression for each uds. for example if (i == 0) uds-0 expresseion else if (i == 1) uds-1 expression

April 4, 2006, 07:19	Re: Different Terms in Different UDS	#3
Carlos V. Guest Posts: n/a	Really must thank you Aidan, I think I got it! With my best regards: Carlos V.

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