Hello, I’d liked to plot magnitude velocity along a boundary curve. As shown on the attached picture, i’d liked to plot this data at the intersection between red surface and the fluid slice. i was thinking a filter as plot over line but i can’t manage to create this intersection curve

Hello thanks for help
But i don’t think that will work cause this filter use only box, cylinder plane sphere shapes
Regarding my problem i need to extract data on red shape boundary which can be intersect with box or cylinder and so on

I guess I’m not sure what you are trying to do then. The plane intersection the shape will result in a curve with data values that you can then plot. Plot on Intersection Curves computes the curve and takes care of the plotting. See the example below:

In the upper left is a geometry, the example disk_out_ref.ex2 file that is distributed with ParaView. In the lower left is the intersection of the geometry with a plane, colored by Temp. On the right is a plot of Temp following the curve, which starts at the top left corner of the intersection curve and proceeds counter-clockwise around it. The x-axis is arc length around the intersection and the y-axis is temperature.

Apologies if I’m misunderstanding what you are looking for.