I have used OpenFOAM for a CFD simulation and right now I am manually trying to obtain the data I need. One of those is the Area averaged Velocity:

In order:

I have used the slice tool to get the area of interest

Used the “generate Surface normal” filter

Calculated with the calculator filter the quantity abs(U.Normals)

Implemented an integration by means of “IntegrateVariables”, activating the “divide per cell area/volume” function

I can correctly compute the area averaged velocity, but I need to isolate the value from the spreadsheet row in order to use this value in successive operations.

Hi and thank you for your very fast reply! I need it in order to calculate a flow uniformity index. I used the Catalyst script generator. Ideally, I would like to select a 2D Surface (a slice) and to obtain a flow uniformity index. The script generated by catalyst is the following: