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Forum: Fluent UDF and Scheme Programming December 7, 2014, 07:20
Replies: 55
Views: 17,119
Posted By behest
If you would like to modify production term of k,...

If you would like to modify production term of k, you may need an UDF for the turbulence model. It is not possible to write an UDF and change production trem. Fluent does not allow us to access this...
Forum: Fluent UDF and Scheme Programming December 2, 2014, 14:57
Replies: 55
Views: 17,119
Posted By behest
In wall boundary condition, I fix k=0 and Omgea...

In wall boundary condition, I fix k=0 and Omgea is obtained as bellow:

/*==============Wall boundary=======================*/
DEFINE_PROFILE(wall_d_bc,t,i)
{
Thread *t0;
face_t f;
...
Forum: Fluent UDF and Scheme Programming December 2, 2014, 13:14
Replies: 55
Views: 17,119
Posted By behest
I have not tried with y+=10 yet. I use first...

I have not tried with y+=10 yet.
I use first order for UDSI themes and the relaxation factor is 0.01
Forum: Fluent UDF and Scheme Programming December 2, 2014, 11:37
Replies: 55
Views: 17,119
Posted By behest
Y+ is less than 1 and I use velocity inlet,...

Y+ is less than 1 and I use velocity inlet, pressure outlet and wall as boundary condition
Forum: Fluent UDF and Scheme Programming December 2, 2014, 08:02
Replies: 55
Views: 17,119
Posted By behest
Hello my friend, what do you think about my...

Hello my friend,
what do you think about my steps for running UDF? Are those steps correct?
May I know your comment?
Forum: Fluent UDF and Scheme Programming November 20, 2014, 14:03
Replies: 55
Views: 17,119
Posted By behest
Actually, I just sent the case/data files and UDF...

Actually, I just sent the case/data files and UDF code without compiling. In this case/data file, I did not compile the UDF, this is my solution without adding UDF. I just sent this case/data files...
Forum: Fluent UDF and Scheme Programming November 20, 2014, 11:40
Replies: 55
Views: 17,119
Posted By behest
I do not use wall function, too. But, you need ...

I do not use wall function, too. But, you need to calculate shear stress on the wall boundary.
Here, you can find my UDF and my Fluent case/data files. May I ask you to glimpse them,...
Forum: Fluent UDF and Scheme Programming November 20, 2014, 07:18
Replies: 55
Views: 17,119
Posted By behest
Red face Hello, May I ask you about that how you...

Hello,
May I ask you about that how you consider y+ and wall shear stress near the wall in your UDF? Did you get them from Fluent by these expressions? ...
Forum: Fluent UDF and Scheme Programming November 14, 2014, 13:01
Replies: 55
Views: 17,119
Posted By behest
Thank you for your answer. I did do, deactivate...

Thank you for your answer. I did do, deactivate the turbulence model in equation panel. Moreover, I hook turbulent viscosity correctly.
Forum: Fluent UDF and Scheme Programming November 13, 2014, 18:18
Replies: 55
Views: 17,119
Posted By behest
Actually, my simulation is crash after some...

Actually, my simulation is crash after some iteration.
I have a question about wall treatment, did you check that your code gives the same value on the wall surface?
Do you know how I hook...
Forum: Fluent UDF and Scheme Programming November 13, 2014, 09:41
Replies: 55
Views: 17,119
Posted By behest
Actually, I have not gotten a good results yet...

Actually, I have not gotten a good results yet and must of time the simulation would be divege after some itteration. It means that some thing is wrong; therefore, boundary condition is one of them....
Forum: Fluent UDF and Scheme Programming November 13, 2014, 05:46
Replies: 55
Views: 17,119
Posted By behest
Unhappy Thank you very much for your answer. My goal is...

Thank you very much for your answer. My goal is to write an UDF for SST model and solve it for a 2D flat plate case.
I run it but it gives me a wrong answer and the result is not the same with...
Forum: Fluent UDF and Scheme Programming November 12, 2014, 11:06
Replies: 55
Views: 17,119
Posted By behest
Hello, Thank you very much for your answer. Did...

Hello,
Thank you very much for your answer. Did you try to write an UDF for SST? Which part of Fluent theory guide is your aim?

Actually, I am writting an UDF for SST model, my problem is the...
Forum: Fluent UDF and Scheme Programming November 12, 2014, 09:28
Replies: 55
Views: 17,119
Posted By behest
Sst udf

Hello all,
Does anyone write an UDF for SST model? Did you get the same results that Fluent gives us?

Actually, I am writing an UDF for a new turbulence model that is very close to the SST model....
Forum: Fluent UDF and Scheme Programming April 2, 2014, 06:53
Replies: 55
Views: 17,119
Posted By behest
Thank you very much for your answer. You are...

Thank you very much for your answer. You are right, we can not play with source term that have already been in Fluent and it is a gap that could be covered in next version of the software.
Any way,...
Forum: Fluent UDF and Scheme Programming April 1, 2014, 14:05
Replies: 55
Views: 17,119
Posted By behest
change in turbulence model, k-w sst

Hello all,
I want to modify the dissipation rate of kinetic energy equation by UDF. Which macro can be used? Is it possible to use DEFINE_SOURCE for definning new dissipation rate?

Actually, I...
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