Problem with Constrained Plane
 

Hello,

I am trying to get the averaged velocity in an axisymetrical nozzle inner section and for that, I created a 2D mesh and a constrained plane spaped to it. But the result shows 0 velocity on the constrained plane and that I looked up in the help and I found that to use a constrained plane, a volumic mesh is necessary. :( But what I need is a 2D axisymetrical mesh and that confused me alot. Anyone can help me please? Thanks! :)

Jishen

I'm really confused as to what you're trying to do. If you have a 2D mesh, that mesh is already a plane. Why do you want to make a plane from that plane?

Unless you are using the very latest version of Star-CCM+, it doesn't have a 2D mesh option. The volume mesh is basically your 2D geometry extruded so that it has a thickness, then the constrained plane cuts through the voume mesh and extracts a their 2D mesh.

However, that changed with v9.06.009 or maybe v10.

Hi Romarius

more over constrained planes are better to visualize the scalar or vector plots or get values where the flow enters a new zone and you don't have an interface to get the values.

A constrained plane hanging in the middle of a volume (or surface in your case) continua will not yield conservative values.