Hunter Wang
Ansys Employee

Open a Command Prompt try below commands to see how Fluent works: 

set HOOPS_PICTURE=msw/win

"C:\Program Files\ANSYS Inc\v222\fluent\ntbin\win64\fluent.exe" 3d -t2

Also try to set HOOPS_PICTURE to opengl, opengl2 and dx11 to see how Fluent works.