possibility of losing discrete phase
Sorry for asking a stupid question, but recently I am confused in the situation that when I run some cases(compressiblefluidisedbed:front&back empty and top patch with a slow bottom flow). I found out eventually(after a relatively long period) the beds looks much much lower than at the beginning. Namely the height of the Bed(with alpha 0.55) reduced from 0.18m to about 0.02m. It looks really ridiculous but I cannot explain why.
I was thinking if the particles had already occupied everywhere of the tube but then I found the very big blue region the alpha is near 0.
Hope someone may know the reason.
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