I have a CSV file with three cols having velocity magnitude. I reconstructed the velocity vector using the calculator : U:0iHat+U:1jHat+U:2*kHat . Then I applied “Gradient of Unstructured Data set” filter to calc QCriterion but the results I am getting are wrong. QCriterion ranges from 0 to 3.4e+38 there are no negative values which is weird.
I have the foam file in another system where just applied “Gradient of Unstructured Data set” to the velocity results ( I didn’t have to reconstruct as it was already there) and the results are coming properly but same thing is not working with the CSV file even though the velocity contour in both matches
Does the geometry imported from the CSV file consist of only points?
If there is no 2d or 3d mesh, the Gradient of Unstructured Data set filter will not work as expected.
Ya, those are just data points. Each data point will have its coordinate system, velocity, pressure info column wise the csv file. So its not possible to use Gradient of Unstructured Data set filter ?