Negative particle size
 

Hi
I am using the DPM model. Some of my particles increase or decrease their diameter size for no reason. I dont have any coalescence models and its just dust particles. The diameter and the parcel size is reported as negative in CFDPOST which obviously is wrong.

Tracking these particles they seem to be the ones close to the wall surface. Initially having the correct specified diameter (a few microns) but this diameter starts increasing and becomes in meters which is even bigger than the whole volume.

Anyone else had this problem before?