[kaveh0a]

Hi guys
I am trying to simulate a particle tracking project in a 90 bend with DPM model in fluent 14. the viscous model is RSM-EWT. In DMP model i set the " Max number of steps" to 5000 and " step length factor" to 5. there is no interaction between particle-particle and particle-continuous phase. I have used Rungt-kutta method for "tracking scheme".
I also created an injection with this following option:
injection type: surface-inlet
particle type: inert
inject using face normal direction:
d=4.7e-06 m
v=18 m/s
flow rate=1.2e-09 kg/s
this is equal to 25000 particle.
in every run that i have performed just 336 particle were tracked.
I have changed the flow rate,velocity,diameter,number of steps but in all cases results were same.
Can any one help me to solve this problem?

[engeagle]

Originally Posted by kaveh0a

Hi guys
I am trying to simulate a particle tracking project in a 90 bend with DPM model in fluent 14. the viscous model is RSM-EWT. In DMP model i set the " Max number of steps" to 5000 and " step length factor" to 5. there is no interaction between particle-particle and particle-continuous phase. I have used Rungt-kutta method for "tracking scheme".
I also created an injection with this following option:
injection type: surface-inlet
particle type: inert
inject using face normal direction:
d=4.7e-06 m
v=18 m/s
flow rate=1.2e-09 kg/s
this is equal to 25000 particle.
in every run that i have performed just 336 particle were tracked.
I have changed the flow rate,velocity,diameter,number of steps but in all cases results were same.
Can any one help me to solve this problem?

I'm not sure, because I'm new with dpm model. But 336 is number of particle streams and I guess this number is related to your mesh. I think you should read theory of dpm modelling from Fluent Users guide.

[kaveh0a]

Originally Posted by engeagle

I'm not sure, because I'm new with dpm model. But 336 is number of particle streams and I guess this number is related to your mesh. I think you should read theory of dpm modelling from Fluent Users guide.

I dont think so because the number of particles that traped in the geometry was different in each result. But thanks anyway