Simple convective flow - Or maybe not

jamesg3373 · November 21, 2012, 11:56

Hi there! Any help would be appreciated on the following problem:

I have been spending quite a lot of time trying to replicate the results of a CFD study conducted by Natarajan Diwakar on behalf of Louis Michaud with the aim of creating a vortex generator.

The main part of this write-up can be read here: http://vortexengine.ca/cfd/Diwakar_N...hesis_Chp5.pdf

I am fairly new to FLUENT, however I've completed all the tutorials available and am familiar with the UI, I also have a mechanical engineering degree (just to make the point that I'm not playing with something I have no idea how to use

).

I am using pressure based solver, SIMPLEC, all secound order and the boussinesq approximation to determine the buoyancy (with a specific operating density of 1.225).

I have even tried what some people have suggested and done a number of iterations at a lower value for "g" and increased it - the only issue is that the problem (residuals) will not converge.

My mesh and geometry are good (as far as I can see).

Any help or hints would be greatly appreciated guys 'n' gals.

Thank you!

jamesg3373 · November 22, 2012, 04:34

Would love some help with this guys. Or maybe just a point in the right direction? Thanks.

November 21, 2012, 11:56	Simple convective flow - Or maybe not	#1
jamesg3373 New Member James Goodwin Join Date: Nov 2012 Location: Liverpool UK Posts: 13 Rep Power: 14	Hi there! Any help would be appreciated on the following problem: I have been spending quite a lot of time trying to replicate the results of a CFD study conducted by Natarajan Diwakar on behalf of Louis Michaud with the aim of creating a vortex generator. The main part of this write-up can be read here: http://vortexengine.ca/cfd/Diwakar_N...hesis_Chp5.pdf I am fairly new to FLUENT, however I've completed all the tutorials available and am familiar with the UI, I also have a mechanical engineering degree (just to make the point that I'm not playing with something I have no idea how to use ). I am using pressure based solver, SIMPLEC, all secound order and the boussinesq approximation to determine the buoyancy (with a specific operating density of 1.225). I have even tried what some people have suggested and done a number of iterations at a lower value for "g" and increased it - the only issue is that the problem (residuals) will not converge. My mesh and geometry are good (as far as I can see). Any help or hints would be greatly appreciated guys 'n' gals. Thank you!

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November 22, 2012, 04:34		#2
jamesg3373 New Member James Goodwin Join Date: Nov 2012 Location: Liverpool UK Posts: 13 Rep Power: 14	Would love some help with this guys. Or maybe just a point in the right direction? Thanks.