Dear all of u, my name is sam and I am making an internship. For my company i have to find a low cost 3D panel method in order to study external flows on subsonic airplanes.For examples interaction between wing and fuselage, ground effect... The fact is there are too many software and i am totally lost, so if someone could give me a list of those software adapted to my case with the advantages and inconvenients it would be really kind and helpfull. Thank you bye advance for your time and consideration. Yours faithfully, Sam.