CFD - Cyclone Separator

The simulated fluid phase is air (20°C, 1 atm, inlet velocity 12.7 m/s), and the dispersed phase density is 2770 Kg/m³ (limestone powder). It is a one-way Eulerian-Lagrangian simulation, so only a pulse containing 50,000 particles was injected (diameter varying 1-9 microns).
The numerical solution is accomplished by the computational code UNSCYFL3D (Unsteady Cyclone Flow 3D). This in-house tool is based on the finite volume method in unstructured three dimensional grids. The SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) algorithm is used to couple the velocity and pressure fields. The three-time-level scheme was used for time advancement and the centered differencing scheme was employed for advective and diffusive terms of the momentum equations. The RNG Yakhot LES turbulence model was employed (Yakhot et al. 1986).
The time step is 5.e-6 s, the video contains 3,000 frames (corresponding to 300,000 time steps).
Grade efficiency curves and fluid velocity profiles agree with experimental data.
This simulation was performed in the Fluid Mechanics Lab. (MFLab) of the Federal University of Uberlândia (MG - Brazil).
The simulated cyclone was experimentally studied by: Obermair, S., Woisetschläger, J. and Staudinger, G., 2003, "Investigation on the flow pattern in different dust outlet geometries of a gas cyclone by laser Doppler anemometry", Powder Technology, v. 138, p. 239-251.

[@Subtomeorelse589]

Wow! awesome CFD-based simulation

[@martajajackson1836]

Thank you for this video.

[@CriticalMass90]

I wish I had seen this years ago. I now really appreciate what's going on inside cyclones.

[@djaleksej]

Which of the calculated coefficient of efficiency of the cyclone filter?

[@MrSabareesh1993]

sir I need to know how to enable both air and sand(dispersed phase) in the inlet phase of cyclone.. currently iam working on cyclone separator simulation, I am using a polyhedral grid. I am not able to do with both sand and air at the same time.. can u help me??

[@davidabeskaron]

do you have dimensions of the model itself?

[@hannychan8423]

Thanks...

[@carslover3509]

GREAT

[@moisedion]

How long this simulation took? You could have run it Steady steady then Transient? Great job though!

[@RicardoVSalvo-sf4yi]

Thanks... It is expensive... first it was simulated in steady state then switched to transient, then the particles were added... It is expensive because take a long time before the particles "decide" to escape or be collected, most of wall when they enter the hopper (considerably smaller velocities).

[@bobbysharma58880]

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[@TheMrGorbasa]

Можно было написать сколько частиц отсеял циклон? Сколько частиц из 50000 прошло вниз, а сколько вверх?

[@RicardoVSalvo-sf4yi]

The cut-off diameter for this cyclone (operating at the stated conditions) is almost 2 micrometers.

[@TheMrGorbasa]

Ricardo V. Salvo Я спрашиваю не про РАЗМЕР. Я спрашиваю - сколько частиц из 50000 отсеялось, а сколько осталось. В процентах или штуках. 95 процентов? 90 процентов? Например: 45000 частиц прошло вниз, 5000 частиц прошло вверх. Ок?

[@RicardoVSalvo-sf4yi]

Yes it is a DPM model. The dimensions are in the paper by Obermair et al., (2003).