Integration Points and normal area vectors
 

I want get cross sections of my calculation domain in CFX! And I use USER_GET_MESHDATA function ...

I choose parameters:

Normal Area Vector ( upper case, it's important ) Integration Points

Function return "normal area vectors at integration points"...

For CUBE ... I get 12 vectors... sum of 4 of them it's face area... I get 3 areas of faces...

Another situation, when I use prism element:

I have 9 vectors: sum of 3 vectors it's area of 1 face, sum of 2 vectors another face, and another 4 vectors I don't understand what they are mean...

Can you tell me, what mean this 4 vectors for prism element?