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How to model particle-particle interaction in DPM

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Old   January 13, 2016, 04:08
Default How to model particle-particle interaction in DPM
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S. Morichika
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Hi All,
I am trying to model particle transport in DPM. I am also trying to consider the particle-particle interaction. I have enabled the DEM Collision from the physical model tab.After running the simulation I got an error message.

Updating solution at time levels N and N-1.
done.
Injecting 1016 particle parcels with mass 1e-25 at t = 0

DEM: Memory allocation for collision mesh failed.
Collision mesh width is very small which will give rise to a
huge collision mesh. Consider inspecting your injection setup.
Maybe the number in parcel is not what you want.


DPM Iteration ....

Error: Out of memory.

Error: Out of memory.
Error Object: #f


Can anyone help me out to fix this problem. I have also unchecked the adaptive collision mesh width and it enabled static collision mesh width. After changing that I didn't get that error message and the model can't inject particle. Here are the details:
Deleted 1016 particles in injection injection-0 with total mass 1.000000e-25 kg

Deleted 1016 particles in injection injection-0 during transient iteration
number tracked = 0, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0
5 1.6035e-01 3.4680e-04 3.1846e-04 2.4847e-04 0:00:00 0

Advancing DPM injections ....
Injecting 1016 particle parcels with mass 1e-25 at t = 0

Deleted 1016 particles in injection injection-0 with total mass 1.000000e-25 kg
number tracked = 0, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0
Flow time = 0.0001s, time step = 1
3499 more time steps


I am badly looking for some help. Thank you for your help in advance. Thanks a lot.

Best Regards,
Saeed
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Old   February 2, 2016, 06:17
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Hassan Mroue
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Advancing DPM injections ....
Injecting 52 particle parcels with mass 1e-23
number tracked = 52, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0, incomplete_parallel = 0
355 4.7819e-04 3.4900e-04 3.3649e-04 2.0866e-07 4.8629e-04 1.1605e-03 0:00:24 145
356 4.8052e-04 3.4872e-04 3.3606e-04 2.0747e-07 4.8468e-04 1.1545e-03 0:00:19 144
357 4.7625e-04 3.4845e-04 3.3553e-04 2.0596e-07 4.8302e-04 1.1479e-03 0:00:15 143
358 4.7067e-04 3.4807e-04 3.3507e-04 2.0472e-07 4.8141e-04 1.1415e-03 0:00:12 142
359 4.7059e-04 3.4775e-04 3.3454e-04 2.0357e-07 4.7983e-04 1.1368e-03 0:00:10 141

Deleted 23 particles in injection injection-0 with total mass 4.321220e-24 kg

Deleted 29 particles in injection injection-0 with total mass 5.678783e-24 kg


Any idea how to solve this problem?
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Old   August 29, 2019, 10:59
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Melanie
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Have your problem been solved? Can you help me? I have the same problem.


Quote:
Originally Posted by mroue View Post
Advancing DPM injections ....
Injecting 52 particle parcels with mass 1e-23
number tracked = 52, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0, incomplete_parallel = 0
355 4.7819e-04 3.4900e-04 3.3649e-04 2.0866e-07 4.8629e-04 1.1605e-03 0:00:24 145
356 4.8052e-04 3.4872e-04 3.3606e-04 2.0747e-07 4.8468e-04 1.1545e-03 0:00:19 144
357 4.7625e-04 3.4845e-04 3.3553e-04 2.0596e-07 4.8302e-04 1.1479e-03 0:00:15 143
358 4.7067e-04 3.4807e-04 3.3507e-04 2.0472e-07 4.8141e-04 1.1415e-03 0:00:12 142
359 4.7059e-04 3.4775e-04 3.3454e-04 2.0357e-07 4.7983e-04 1.1368e-03 0:00:10 141

Deleted 23 particles in injection injection-0 with total mass 4.321220e-24 kg

Deleted 29 particles in injection injection-0 with total mass 5.678783e-24 kg


Any idea how to solve this problem?
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Old   August 29, 2019, 11:29
Default call for your help
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Melanie
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Hi, have your problem been solved? I have the same problem, wait for your help.

Quote:
Originally Posted by Saidul View Post
Hi All,
I am trying to model particle transport in DPM. I am also trying to consider the particle-particle interaction. I have enabled the DEM Collision from the physical model tab.After running the simulation I got an error message.

Updating solution at time levels N and N-1.
done.
Injecting 1016 particle parcels with mass 1e-25 at t = 0

DEM: Memory allocation for collision mesh failed.
Collision mesh width is very small which will give rise to a
huge collision mesh. Consider inspecting your injection setup.
Maybe the number in parcel is not what you want.


DPM Iteration ....

Error: Out of memory.

Error: Out of memory.
Error Object: #f


Can anyone help me out to fix this problem. I have also unchecked the adaptive collision mesh width and it enabled static collision mesh width. After changing that I didn't get that error message and the model can't inject particle. Here are the details:
Deleted 1016 particles in injection injection-0 with total mass 1.000000e-25 kg

Deleted 1016 particles in injection injection-0 during transient iteration
number tracked = 0, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0
5 1.6035e-01 3.4680e-04 3.1846e-04 2.4847e-04 0:00:00 0

Advancing DPM injections ....
Injecting 1016 particle parcels with mass 1e-25 at t = 0

Deleted 1016 particles in injection injection-0 with total mass 1.000000e-25 kg
number tracked = 0, escaped = 0, aborted = 0, trapped = 0, evaporated = 0, incomplete = 0
Flow time = 0.0001s, time step = 1
3499 more time steps


I am badly looking for some help. Thank you for your help in advance. Thanks a lot.

Best Regards,
Saeed
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Old   May 29, 2021, 04:56
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This problem can be solved by increasing the injected mass-flow rate, such as 1e-25 -->1e-10.
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