Thank you for your reply. I've followed your suggestion by modifying the granular properties. Then it worked
I am finding out the effect of air velocity to the movement of fine particle.
I think I should make a stable granular region before including the effect of air movement.
Below is my setting. The other I retained the defaults. (I simulated in a close boundary)
Now, I've faced the problem about the stable granular
The granular region is not stable when I implement steady iteration. Its height decreases until vanishes.
However, I justed changed to iterate with transient, then the granular region was stable.
Do you have any general suggestion why iterating with transient, the granular layer is stable than that with steady?
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