I think Flow 3d cast can help you in your design

Dear zaid,

Thanks for your response.

I would suggest you model the parts in solidworks. Then you can use solidworks simulation, ANSYS, or Abaqus to do the analysis. You will need to export the parts as STEP files or STL files in order to import them into ANSYS or Abaqus. There is a steep learning curve but youtube has many tutorials on these software.

Dear Jeremy,

Thanks for your answer. I have used this method for mechanical parts. But, now I am faced to the structures. For example a two story building. I am not sure if this is the most straight forward method? Or an other software make it easier?

Best,