|October 21, 2013, 04:47||
DPM Breakup Model
Join Date: Dec 2011
Posts: 13Rep Power: 6
I am trying to model the transient injection of gas that causes the dispersion of solid particles whose initial velocity is 0 m/s. The gas will lift the solid particles and will reduce its pressure and velocity during the dispersion process.
The particles are fragmented dutring the dispersion process. So I included the breakup Wave model.
When I don't use the breakup model the convergence is very good, but, if I activate it the calculation diverges after 9 ms. However, it is necessary to include the particles fragmentation in the simulation.
This is some information about my simulation:
Boundary conditions: Velocity inlet with varying profile and pressure outlet with fixed value
Turbulence model: RANS RSM and LES
Iterations/Time step: 40
Particle size: Between 26 and 86 µm (600000 particles aprox with Rosin-Rammler distribution)
Number of mesh elements: 483188
Minimum element size: 8.5e-4 m
Maximum element size: 3.0e-3 m
fluent time step: 1 ms
Solid particles time step: 0.01 µs
Please, give me your comments and suggestions
|October 24, 2013, 05:21||
Join Date: Jul 2013
Location: Grenoble, France
Posts: 7Rep Power: 5
Did you try to set a lower Time Steps and a higher number of iterations/time step?
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