snappyhexmesh stl file generation
 

Dear all,
I am a PhD student & am new to openFoam. I am interested in mixing study of tank with agitator. Can you help me out how to proceed on this? i have a tank with agitator in my lab. Do i have to solv it for 3D case? In which dimension ( 3D or 2D) i must prepare CAD drawing & convert it into stl. ?