Mixing modelling

lethu · June 2, 2017, 09:26

Hello,

I am trying to model stirring in a tank full of water. The aim is, in the end, being able to add particles and do some particle tracking.

I want to use uncoupledKinematicParcelFoam.
But first, I have to compute the velocity field created by some agitators.

I don't know which models to use in order to do this :
- either actuationDiskSource using negative coeffs to model motor engine and not turbine
- either rotorDiskSource but I don't know all the required inputs such as drag and lift coeffs vs angle of attack for example
- or using MRFProperties : it only requires but this requires to mesh the rotor physically.

Does anyone have tried to model mixing ?

Thanks for your help !

lethu · June 7, 2017, 05:58

I have read that some people try to model stirring devices by adding a source term in the momentum equation.

It would avoid the description of the agitators and a heavy meshing of these.

Don't you think that it would simply the problem too much ?

I don't know how this method would take in account the positions of the agitators...

June 2, 2017, 09:26	Stirred tank modelling	#1
lethu New Member Kim Le Join Date: May 2016 Location: Lyon, France Posts: 21 Rep Power: 9	Hello, I am trying to model stirring in a tank full of water. The aim is, in the end, being able to add particles and do some particle tracking. I want to use uncoupledKinematicParcelFoam. But first, I have to compute the velocity field created by some agitators. I don't know which models to use in order to do this : - either actuationDiskSource using negative coeffs to model motor engine and not turbine - either rotorDiskSource but I don't know all the required inputs such as drag and lift coeffs vs angle of attack for example - or using MRFProperties : it only requires but this requires to mesh the rotor physically. Does anyone have tried to model mixing ? Thanks for your help ! Last edited by lethu; June 7, 2017 at 06:26.

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June 7, 2017, 05:58		#2
lethu New Member Kim Le Join Date: May 2016 Location: Lyon, France Posts: 21 Rep Power: 9	I have read that some people try to model stirring devices by adding a source term in the momentum equation. It would avoid the description of the agitators and a heavy meshing of these. Don't you think that it would simply the problem too much ? I don't know how this method would take in account the positions of the agitators...