I am looking for a free software to play with CFD, changing my motorcycle fairing, understanding and changing airflow over my helmet, etc. Is there any free software for me to start with?

inform me also if u got. and also inform me about other materials which r available on internet thanks

I got this and think it will be better for you http://www.dove21.com/cfd/cfd.shtml

Thanks, mukkarumhussain, but I am still looking. I don't know if earlier versions of FLUENT or other CFD softwares are already available for free or low cost, but it shouldn't be that difficult to find some CFD software for amateur purposes.

If you want to simulate 2-D flow, give my shareware MicroTunnel a trial. Download and first three days running the software is free.

www.microcfd.com