Valve Flow Volume Space - Creation with Select faces and edges

[Emol]

In the initial part of the simulation promotional video http://www.youtube.com/watch?v=oL_DOxFagvI&feature​=channel

the internal space of the valve is selected by first selecting faces, then selecting Part Priority and then Isolation, producing the combined total flow volume space. Despite repeating this procedure many times I find I am unable to create and isolate the required volume space.  The inner surfaces of the valve are selected but when selecting Part Priority, part of the valve solid part highlights and the selected inner valve surfaces disappear.  Can anyone suggest where I maybe going wrong with this??

I have managed to derived the volume space by subtracting a new derived part, however the example provided in the video suggests the process of defining the air space can be achieved a lot quicker.

Many thanks.  

[Mark_Wigan]

hello,

what version of multiphysics are you using with inventor?

[Emol]

Hi Mark, Multiphysics 2012.

[Anonymous]

Valve Flow Volume Space and creation with select faces and edges are the little bit difficult to make the process the successful. I think we can use Youtube and different guides through different sites to acknowledge the whole process and then follow it to make the products in a workable form.