A beginner question
 

Hello all,

I am a CFD person but have no experince with OPENFOAM at all. Could you please let me know the following?

1) How long it takes to learn and be able to run a simple flow problem (e.g., flow past cylinder), including mesh making?
2) Can I use a Fortran code to call OPENFOAM?

Your input is greatly appreciated.

Go and see

Not very long if you have some experience with codes (not commercial black boxes), and with the UNIX/Linux environment.

The story changes if you have to change the code, and at that point I would recommend to either take a course from OpenFOAM developers or be prepared to spend a good amount of time exploring and learning the code details.

If you mean call the executable, yes, nothing different from any other executable. If you mean calling OF functions from a fortran code, I would say it's not impossible but it might be hard.

Best,

Hi Alberto,

I mean to call executables, this post is from me to thread " How to interface a Fortran thermodynamic tool with OpenFOAM?"
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Hi,

I have couple of fortran.90 subroutines which I would like to call from OpenFOAM1.6. What I know direct call of fortran subroutine from c++ is not good. Thus, one has to have C interface to routines and some more technical difficulties as, fortran stores rowwise C stores columnwise :confused: Whatever, these are general problems of C++ and Fortran mixing. My questions are more OpenFOAM specific:

1) What should be the compiled fortran source codes, dynamic library, shared objects (.so), objects (.o) ... ? If more than one is good, which one performs better?

2) How should be this "executables" (compiled files) linked to OpenFOAM, let's say scalarFoam? How should the <file> and <options> in Make folder be modified?

Please no suggestion like "why don't you rewrite your subroutines in C++" ;-)

All the best,

@ Cyp: You see, I am chasing you ;-)
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Any idea?

Cheers,


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Hi Evren,

You can call Fortran routines from within C++ code using the extern directive. There are some general hints here, here, and here. Also, check this and this OF related threads.