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January 13, 2021, 15:51 |
Problem with DPM
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#1 |
New Member
Join Date: Jul 2016
Posts: 5
Rep Power: 9 |
Hi
I have a project regarding particles dispersion. Recently, I found something strange in Fluent DPM. I did a test by injecting a particle at constant speed and zero drag coefficient. So, the particle should reach the outlet by time=length/speed. But it is not, the result depends on the time step used. The attachment is the result and the UDF I used for testing. I found when particles cross a cell, it jumps in the position. This problem results in the transit time gets shorten non-physically. And it only happens to particles flow in the inflation layers where the cell is really thin. Does anyone know why this is happening? Any commend is appreciated. |
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