VOF, DPM model - particle penetrate phase interface issue!

dwoh12 · January 7, 2022, 04:45

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

Jeffer · May 20, 2022, 00:49

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

January 7, 2022, 04:45	VOF, DPM model - particle penetrate phase interface issue!	#1
dwoh12 New Member dwoh Join Date: Jan 2022 Posts: 1 Rep Power: 0	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 Jeffer likes this.

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May 20, 2022, 00:49		#2
Jeffer New Member jefferson Join Date: Dec 2021 Posts: 6 Rep Power: 4	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