what is basic of CFD ?
I don’t really get your point but if you want to know what the best cfd software is, I’d recommend the QuickerSim CFD Toolbox for Matlab. Especially if you’re already familiar with Matlab environment. It’s very easy to use and you can modify the code so that it suits you perfectly.
You can get a free version here: http://quickersim.com/cfdtoolbox/download/
There are also many helpful tutorials available: