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VOF, DPM model - particle penetrate phase interface issue!

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Old   January 7, 2022, 04:45
Smile VOF, DPM model - particle penetrate phase interface issue!
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dwoh
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issue


transient, VOF (water-air), DPM flow

inert particle in water flow penetrate water-air interface.

in an experiment, if particle density is closed to water, particles moves along the water flow streamline (velocity vector).

However, in the simulation, particle goes to air phase and move continuously...


simulation condition


flow condition

transient



volume of fluid (water, air)

implicit formulation

implicit body force

phase 1 : air (1.225 kg/m^3)

phase 2 : water (997 kg/m^3)

surface tension force modeling

surface tension : 0.072 [N/m]

continuum surface force - wall adhesion



viscous model (for turbulent)

k-epsilon (2eq)

realizable

scalable wall function



discrete phase (on)

interaction with continuous phase

unsteady particle tracking



inert - particle properties

size : 5um

denstiy : 1095.2 kg/m^3



injection type

normal to the inlet surface

randomize starting point

velocity : 0 m/s



boundary condition

inlet

water flow velocity : 0.03 m/s

water Volume fraction : 1

discrete phase BC type : reflect



wall

discrete phase BC type : reflect



outlet

pressure-outlet

discrete phase BC type : escape



method

scheme : simple

presusre : PRESTO!

second order upwind (대부분)



initialization

compute from : inlet

patch to fluid region

velocity : 0 m/s

water Volume fraction : 0

before calculation, check through result contour (water phase 0, velocity 0 m/s)



run calculation
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Old   May 20, 2022, 00:49
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jefferson
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Hi

Did you found the solution? I have the same proble, tha particles don't move with the water phase and I would like to know if you solve the problem
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interface, meniscus, multiphase particle

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