The name of points coordinates in vtu output files

General
1

Dear all,

I am trying to extract all fields data from the output .vtu file through data. Now the “velocity” and “pressure” arrays can be successfully extracted. However, the name of three coordinates (x, y ,z) stored in the vtu file cannot be found. Does anyone know what the name of the 3 coordinates is in the vtu files?

Best regards,
Will

2

Hi Will,

It’s called coords vector in the Paraview GUI. You can see it if you apply calculator filter and open the vectors dropdown menu.

In pvpython:

nodes = vtk_to_numpy(data.GetPoints().GetData())

Niki

3

Dear Niki,

When reading vtu files, there are repeated nodes in each physical location in the output of vtu files, which means there are always several nodes on each identical (x,y,z) coordinates location.

The problem is that the velocity profiles (u,v,w) on each identical node are not identical, which is quite confusing.

So is there any relations between the different velocity values on those node with identical locations? By the way, is it able to find the ghost nodes from the vtu files?

Best regards,
Will