Water-air interface
 

Dear all,

I am creating a 3d tank in CFX and hope to apply in current flow to the tank, and later some waves. Ultimately a cylinder will be placed in the tank to find the forces, etc. But firstly, i need to know how to let CFX knows that there is water and air in my geometry model. I saw CFX Tute 16 where they used volume fractions for the gas-air flow but i still do not understand how to apply that to my model.

Or is there another easier way out?

Hopefully you guys can help me out on this.

Thank You. Kwong

Re: Water-air interface
 

Did you try the free surface flow over a bump tutorial? Check that one out, it has air and water. To answer your question, you change the parameter "fluid list" under Domain:Default Domain (assuming you haven't named your domain anything different) to include both air and water. You'll also need to initialize the domain with the appropriate values for air and water volume fraction using a step function in CEL. Definitely check out the free surface tutorial.

Hopefully that helps...

-Alex

Re: Water-air interface
 

Leave it! Go for shopping! :)