[daniebae]

Dear all,

i am doing a transient simulation. A solid is pressing in a fluid. the Fluid contains water and air. How can i define in CFX which part of the domain contains water or air ? there is no outlet and inlet.


thanks for an answer.

daniel

[ghorrocks]

The CFX tutorials show the various ways water and air can be specified. The 2D flow over a bump one shows the free surface approach, the bubble column one shows the eularian approach.

[100tinela]

Originally Posted by ghorrocks

The CFX tutorials show the various ways water and air can be specified. The 2D flow over a bump one shows the free surface approach, the bubble column one shows the eularian approach.

Like ghorrocks said, the tutorial "Flow over a bump" show how you can define it. You basically define these fluids in your domain settings and create a expression using step function to define two different volume fractions.

You also can find more information in CFX manual looking for "free surface".

Good luck,
Willian

[vishal.indomitable]

Specify the working fluids as Water and air. That may solve your problem.