Radiation modelling

sunilpatil · May 3, 2013, 15:22

Hello sir,
In radiation modelling Due to the high computational resources required for
the calculation of the radiation field for the MC and DT radiation models, is it possible to model coarser mesh for radiation field and fine mesh for flow field (assuming that the radiation field changes at a slower rate than any other transport variables) for a same problem..if possible how can we do this in CFX
Thank you sir,
Sunil Patil

ghorrocks · May 5, 2013, 08:52

The Discrete transfer model has a much lower computational load than the Mone Carlo method. And both models have a large number of settings applicable to them so you can coarsen or refine them to your heart's content.

And by the way - the radiation ray tracing is already calculated on a coarser grid than the fluid equations. So if you want to coarsen this further just increase the coarsening factor.

May 3, 2013, 15:22	Radiation modelling	#1
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 14	Hello sir, In radiation modelling Due to the high computational resources required for the calculation of the radiation field for the MC and DT radiation models, is it possible to model coarser mesh for radiation field and fine mesh for flow field (assuming that the radiation field changes at a slower rate than any other transport variables) for a same problem..if possible how can we do this in CFX Thank you sir, Sunil Patil

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May 5, 2013, 08:52		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	The Discrete transfer model has a much lower computational load than the Mone Carlo method. And both models have a large number of settings applicable to them so you can coarsen or refine them to your heart's content. And by the way - the radiation ray tracing is already calculated on a coarser grid than the fluid equations. So if you want to coarsen this further just increase the coarsening factor.