simple question abour diffusion terms(urgent)

mohammadkm · March 12, 2014, 16:05

Hi,
In Fluent 6.3.26, I have used second-order upwind for momentum discretization and the SIMPLE procedure for velocity-pressure coupling. Does it mean that diffusion terms are second-order upwinded? In fact, I do not know whether diffusion terms are second-order upwinded or central differenced in the Fluent.
How can I address Slope limiting schemes in Fluent? As far as I know, Slope limiting schemes is used only when momentum equations are discretized with MUSCL. So, I think Slope limiting schemes is not used in my case since momentum equations are discretized with second-order upwind. Is it right?
I need these answers for my close thesis defense, so it would be great to help me in finding the answers.
Thank you so much in advance.

RodriguezFatz · March 13, 2014, 07:34

To your first question: At least in later versions of Fluent, diffusion is always central differenced.

March 12, 2014, 16:05	simple question abour diffusion terms(urgent)	#1
mohammadkm Member mohammad Join Date: Apr 2010 Posts: 42 Rep Power: 16	Hi, In Fluent 6.3.26, I have used second-order upwind for momentum discretization and the SIMPLE procedure for velocity-pressure coupling. Does it mean that diffusion terms are second-order upwinded? In fact, I do not know whether diffusion terms are second-order upwinded or central differenced in the Fluent. How can I address Slope limiting schemes in Fluent? As far as I know, Slope limiting schemes is used only when momentum equations are discretized with MUSCL. So, I think Slope limiting schemes is not used in my case since momentum equations are discretized with second-order upwind. Is it right? I need these answers for my close thesis defense, so it would be great to help me in finding the answers. Thank you so much in advance.

March 13, 2014, 07:34		#2
RodriguezFatz Senior Member Philipp Join Date: Jun 2011 Location: Germany Posts: 1,297 Rep Power: 26	To your first question: At least in later versions of Fluent, diffusion is always central differenced. __________________ The skeleton ran out of shampoo in the shower.

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