July 11, 2021 at 11:37 amKCHENGSubscriber
I´m doing a simulation with ddpm+dem model in order to simulate freefall of metal powder in a box.The result shows no heap of powder on the bottle of box.I think the number of particle could be the reason (10000 particles are injected).The boundary condition dpm could be a reason.I have tried to change the parameter of boundary condition from REFLECT to TRAP.But many particles are missing in calculation.
I have wrapped the settings and result in attachment.
Thanks in advanceJuly 12, 2021 at 11:37 amDrAmineAnsys EmployeeInsert your pictures in your text. Please.
July 12, 2021 at 6:51 pmJuly 13, 2021 at 11:52 amDrAmineAnsys EmployeeSo heap is expected to form at the bottom wall right? Are you using adequate particle time step size to resolve the collisions? Important for heap formation: rolling friction. You should enable tracking the torque of the particles. Moreover you do not need to use DDPM as I assume it is just particle simulation so you might disable flow simulations.
July 13, 2021 at 9:14 pmKCHENGSubscriberI cant find any "Reaction" between bottom wall and particles such as heap or reflection.Particles touch the wall and freezed.
following two images(after 5/10 time steps)
I think rolling friction means tangential friction of spring-dashpot right?I will work on it.(In this simulation is tangential contact not relevant).
Time step size is not the case.I checked output file of calculation.No particle missed.
Can you give me more hint how to enable the torque tracking of particle?Which dialog box should i use?
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