Wear prediction

Hi Everyone

I dont know if this problem is a post-processing or a LIGGGHTS problem. I hope this is the right forum.

I ran the "chute_wear" example in (LIGGGHTS 1.2.1). During visualizing the results in Paraview, I get an error which looks like the wear prediction function does not work right.

I show in the attached 3x files a Paraview view of the model from above (at the same timestep for all 3x files):
- "wear.png"
- "shear.png"
- "pressure.png"

Looking at "wear.png", it appears that:
1) there is no cumulative wear caused by the region of the initial impact of each of the spheres in the vertical/downwards stream.
2) all wear is confined to the bottom left part of the picture

In comparison, for both "shear.png" and "pressure.png" it appears that shear and pressure "events" registers for triangular faces where spheres touch, and also that this happens both above and below the red line (x-axis) in the mentioned images.

A further problem arises at Paraview snapshot no 240 (i.e. at timestep = 240*200 = 48,000):
From this point till the end of the visualization in Paraview there is no further shear or pressures registering anywhere a sphere touches the geometry. Compared to the wear visualisations, there is at least something that looks right untill frame 240, whereas for wear it looks wrong the whole time.

Any thoughts, please?

Kind regards

Alexander