QUESTION 1...I have a circular device sitting inside a rectangular domain(tank). i am trying to build the device and then cut it from the recangular domain... is there anyother way of making the device inside this recangular domain.??? Question 2 ... the divice is fully submerged in water. Now the initial volume fraction of water (and air) is defferent from the outside wave tank(recangular domain) actually some air is trapped in the device. Could you please suggest any idea ot intruducing these two different initialization for volume fractions.

Hi,

Question 1 is a simple question on geometry creation. Do the tutorials on geometry creation and you should be OK.

Question 2 - You have to specify the volume fraction at all points in the domain using a function somehow. This function can either be using CEL expressions (eg step, domain etc) or an interpolation function.

Glenn Horrocks

Hi Glenn.. thanks for your time. But this is what i already know. My questions are adressing the next step...

You could create a subdomain for the circular region and then use the inside() function of CFX (check your documentation on that) multiplying other functions to prescribe the initial volume fraction field.

It could be something like this: inside()@CircularDomain * VF_CircDomain + (1-inside()@CircularDomain) * VF_RectDomain