[Jogginghose]

Good evening,

I am new to CFD and I am working on a fibrous filter simulation. I use CEL expressions to create cylinders with a randomzied orientation. In order to get that randomization I thought about a Fortran subroutine which can create random numbers ([0,1)).

Since I am not really good at coding, I have looked for already existing codes and found some Fortran codes for random number generators (e.g. Mersenne-Twister). I created new enviromental variables for windows, used the Intel compiler and got two files (a .dll and .O). And now I have two questions:

1. I always start CFX with the workbench but where do I need to put the files?
I put the files in the folder ANSYS creates for my project but I guess that is wrong because I get the error message:

| Message:
|
| Unable to load symbol <file name> from ..\winnt-amd64\<file name>.dll:
| The specified procedure could not be found.

2. Or do I need an extra Fortran code that is compatible with CFX?

I hope somebody can help me with this problem and thanks in advance.

[ghorrocks]

Doesn't your fortran compiler have a random number generator built in? All the compilers I have seen have one. Then you don't need an external library.

Have a look in the CFX documentation for examples of linking fortran to CFX.

[Jogginghose]

Thanks for your help so far, I will have look.

[Jogginghose]

Hey,

my random number generator is working quite well now; I used the intrinsic subroutine RANDOM_NUMBER of Fortran. But I still have one problem:

When I use the User Function I get an array of random numbers between (0,1), but I need just one number (or an array with the same number everywhere). I tried several things, the furthest I got was one random number and every other number was my function argument (e.g Function 1(0.25)).

I would appreciate some tips from somebody who has more experience than me in Fortran.

Thanks in advance.

PS: I attached my fortran source code and pictures for the two cases above. I used the velocity to test my subroutine.