Reply To: General connection between main flow path and circumeferential groove in CFX

[CFD_Friend]

Hi,

The reason is that the distance between the interface faces is above the tolerance level. You have to keep both of them very close to achieve a proper connection. Otherwise, it creates a non-overlap condition. Try to make this as close as possible to avoid such problems.

You can check whether the interfaces are in non-overlap condition or not, using contours in CFD-Post. Select the shroud boundary, and create a contour using the variable "Nonoverlap Fraction"

If the boundaries overlap, that section will be colored blue (value =  0), if there is no overlap, then that region will be colored red (value =1)