[Saidul]

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

[mroue]

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?

[wang201908nuo]

Have your problem been solved? Can you help me? I have the same problem.

Originally Posted by mroue

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?

[wang201908nuo]

Hi, have your problem been solved? I have the same problem, wait for your help.

Originally Posted by Saidul

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

[Shevin W.]

This problem can be solved by increasing the injected mass-flow rate, such as 1e-25 -->1e-10.