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What caused the removal of the majority of the particles from the domain in EDEM-Fluent coupling?

User: "Fatemeh Hosseini_22198"
Fatemeh Hosseini_22198
Altair Community Member
Updated by Fatemeh Hosseini_22198

Hello, everybody,
I am trying to simulate particles in a turbulent flow by Coupling Fluent and EDEM.
Both Fluent and EDEM run well individually. 
Initially, after over 1000 iterations of running the CFD-DEM simulation, the EDEM crashed.
The mesh in Fluent had been verified and the CFD/DEM timestep ratio was 80.
In order to prevent reverse flow at first, I tried to shift the particle's entrance and decreased the CFD timestep (CFDtimestep/DEM timestep=50).
It appears to be running now, but most of the particles were removed.

The boundary condition is periodic and all the particles should remain on the tube. (Please see the attached picture)

Additionally, the maximum velocity for particles is 190 m/s, but the maximum velocity for fluid particles is 15 m/s!
Would you kindly advise me on this matter?

Regards,
Fatemeh
image

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