Can't set absorption coefficient for inert particle

lauripar · July 29, 2010, 07:31

Hi, I'm using Ansys fluent 12.1 and I'm modelling a UV-reactor for water disinfection. I have been able to release particles to the reactor, but I can't set the absorption coefficient for the particles.
I have tried to follow the instructions at the UsersGuide. It says:

ANSYS FLUENT will include the effect of particles on the absorption coefficient if you have turned on the Particle Radiation Interaction option in the Discrete Phase Model dialog box.

I have done that but I can't still set the absorption coefficient for particles. After I have checked the Particle Radiation Interaction at the Discrete Phase Model dialog box. I can set particle emissivity and scattering coefficient but not absorption coefficient.
So how I do that?
Thanks for helping!

lei · May 9, 2012, 15:09

Did change the material property in Material>particle>particle emissivity? It should be non-zero value so the impact on absorption coefficient can be added.

July 29, 2010, 07:31	Can't set absorption coefficient for inert particle	#1
lauripar New Member Lauri Parviainen Join Date: Jul 2010 Posts: 8 Rep Power: 15	Hi, I'm using Ansys fluent 12.1 and I'm modelling a UV-reactor for water disinfection. I have been able to release particles to the reactor, but I can't set the absorption coefficient for the particles. I have tried to follow the instructions at the UsersGuide. It says: ANSYS FLUENT will include the effect of particles on the absorption coefficient if you have turned on the Particle Radiation Interaction option in the Discrete Phase Model dialog box. I have done that but I can't still set the absorption coefficient for particles. After I have checked the Particle Radiation Interaction at the Discrete Phase Model dialog box. I can set particle emissivity and scattering coefficient but not absorption coefficient. So how I do that? Thanks for helping!

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May 9, 2012, 15:09		#2
lei New Member Lei Chen Join Date: Mar 2010 Posts: 21 Rep Power: 16	Did change the material property in Material>particle>particle emissivity? It should be non-zero value so the impact on absorption coefficient can be added.