Rotary Mixer Simulation

Submitted by neelu09 on Mon, 01/16/2012 - 22:28

I am trying to simulate mixing of granular particles in a rotary drum mixer. How can give different values to young modulus, coef of restitution, etc for particle particle interaction and particle vessel interaction cause.

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Philippe's picture

Philippe | Tue, 01/17/2012 - 08:40

Hi,
you need to set different atom types for your particles and the walls. Then you can set those values with the

fix property/global

command. For example, the expression

fix ym all property/global youngsModulus peratomtype 1e8 3e8

sets Young's Modulus to 1e8 for atom type 1 and to 3e8 for atom type 2. For pair-wise values, such as coefficient of friction, the syntax is

fix cf all property/global coefficientRollingFriction peratomtypepair 2 &
0.01 0.05 &
0.05 0.03

will set the coefficient of friction to 0.01 for contact between two particles of type 1, to 0.05 for contact between particles of type 1 and 2 and to 0.03 for contact between two particles of type 2.

regards,
Philippe

neelu09 | Thu, 01/19/2012 - 19:47

Hi,

Thanks for the help Philippe. I also need some help with paraview(3.12). I am not able to view my particles as spheres, rather they appear only as point masses in paraview. I have tried various display settings but nothing seems to help. Am i missing something??

Regards,
Nishith

Philippe's picture

Philippe | Fri, 01/20/2012 - 10:56

Hi,

in newer versions of ParaView (3.10 and newer afaik) you can also use the PointSprite module. It is much faster than sphere glyphs, but has a few drawbacks, for example it cannot represent growing spheres (which is irrelevant in most cases anyway)

regards
Philippe