[easy_astronaut]

Hi,
I'm an Aeronautical Engineer and keen to write a CFD code.
But unluckily, the biggest question in my mind is WHERE TO START?
I know the math, but don't know the tools.
So can anyone tell me which tool I should use to write a CFD code?
Whether it's C or FORTRAN or anything else. Also, in which language the famous CFD tools like FLUENT and CFX are written?

I'll be very much thankful to you for an answer.

Thanks,
Sahaj.

[DoHander]

Commercial CFD codes (like Fluent or CFX) are usually developed in C or C++. However if you want to develop your own CFD code probably Fortran 95/2003 is a better choice.

Do

[Dhileep T K]

I suggest MATLAB. Post processing will be easy.

[shirazbj]

like to use gmsh for post processing. It's free and easy.

[valgrinda]

Hei,

when you plan to write a small cfd program with few lines of code, Fortran is ok. When you have a large project in mind and think about working with the program for a long time, you should consider C++. Then it is much easier to add to the code, to maintain it and have more than one developer to work with it. Both languages have support for MPI, which is needed for efficient parallel computation.

Regards
Hans

[walli]

I would suggest to use an existing library for the mesh handling, shape functions, linear algebra and so on, because implementing this can be very time-consuming. C++ is a good choice, since you can program with a low overhead and reuse code easily. You might want to have a look at different projects, e.g.

http://dune-project.org/
http://dealii.org/
http://download.gna.org/getfem/html/homepage/
http://trilinos.sandia.gov/
http://www.fenics.org/wiki/FEniCS_Project

... there are many more, these are just the ones that automatically came to my mind.

[valgrinda]

Another, very interesting project can be found here:
http://wissrech.iam.uni-bonn.de/rese...3DGP/index.htm

The C++ source code can be downloaded. They use finite differences and the MPI library for parallelization.

Regards
Hans