# VOF, DPM model - particle penetrate phase interface issue!

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 January 7, 2022, 03:45 VOF, DPM model - particle penetrate phase interface issue! #1 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.

 May 19, 2022, 23:49 #2 New Member   jefferson Join Date: Dec 2021 Posts: 6 Rep Power: 3 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

 Tags interface, meniscus, multiphase particle