Unsteady flow: NITA or Frozen flux?

Sarah · April 15, 2010, 07:45

Dear all,

I am a new user of Fluent and even newer in transient simulations. I see there are two options to increase the iteration speed:
- non-iterative time advancing
- frozen flux formulation

I find only limited information about these option in the Fluent manual, and would appreciate it if someone can give me some information (or references to) about in which case which option is advisable.

I am modelling mixed convection flow in a room, with the boussinesq approximation.

Kind regards,

Sarah

niravtm007 · August 23, 2011, 07:06

hello can any one please help how to use non iterative time advancement scheme in fluent . ? i am using a fluent with a cubical geometry intially half filled with water and other half filled with air ( i did the patching ) but not sure how to use NITA scheme ???? please send some suggestions

anand.jittanakatti · December 3, 2015, 04:27

Hi, Refer the below link, you may get the better understanding on the NITA or Frozen flux.

http://aerojet.engr.ucdavis.edu/flue...g/node1000.htm

April 15, 2010, 07:45	Unsteady flow: NITA or Frozen flux?	#1
Sarah New Member Join Date: Apr 2010 Posts: 5 Rep Power: 16	Dear all, I am a new user of Fluent and even newer in transient simulations. I see there are two options to increase the iteration speed: - non-iterative time advancing - frozen flux formulation I find only limited information about these option in the Fluent manual, and would appreciate it if someone can give me some information (or references to) about in which case which option is advisable. I am modelling mixed convection flow in a room, with the boussinesq approximation. Kind regards, Sarah

August 23, 2011, 07:06	Nita scheme	#2
niravtm007 Member Nirav Join Date: Jul 2011 Posts: 43 Rep Power: 15	hello can any one please help how to use non iterative time advancement scheme in fluent . ? i am using a fluent with a cubical geometry intially half filled with water and other half filled with air ( i did the patching ) but not sure how to use NITA scheme ???? please send some suggestions

December 3, 2015, 04:27	Unsteady flow: NITA or Frozen flux?	#3
anand.jittanakatti New Member Jittanakatti Join Date: Nov 2015 Location: Bangalore Posts: 4 Rep Power: 11	Hi, Refer the below link, you may get the better understanding on the NITA or Frozen flux. http://aerojet.engr.ucdavis.edu/flue...g/node1000.htm

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