Hi Mladen,

With import model in FLUENT, you should change type file .IGS or .STEP 

You can see this video below the do this:

Regards.

https://www.youtube.com/watch?v=seJCyJ-v0FE

Hi Hung,

it is not problem this. I export file in type .igs or .x_t

But how to create air and water in model? Should  it be created in Solidworks or in Fluent?

Regards 

 Hung Pham

As Mladen Bošnjaković, pointed out, After creating the CFD model  ( CAD model with Solid & fluid region of interest),you need to generate the mesh , apply boundary condition, set up solver and launch solver.

Make sure that the model you created in solid work have both solid and fluid region , then generate the mesh by using any one of the meshing tool you are familiar with   , ICEM CFD /ANSYS Mesher/Fluent Mesher.

Hi Hung,

I created psychical model in SolidWorks and add water in tubes as cylinders. I created air as cube and  and put it through a physical model. In SolidWork is not posible to make substraction psychical model from cube to obtain air (if so I do not know how).

Air is possible to obtain in FLUENT after importing file because Fluent has Boolen operation substract. OK , this question is solved.