Simple convective flow - Or maybe not

jamesg3373 · November 21, 2012, 10:56

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, 03:34

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

November 21, 2012, 10:56	Simple convective flow - Or maybe not	#1
jamesg3373 New Member James Goodwin Join Date: Nov 2012 Location: Liverpool UK Posts: 13 Rep Power: 13	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!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[ANSYS Meshing] Simple Symmetry Mesh Question - Flow around Bluff Body	Matlab69	ANSYS Meshing & Geometry	20	April 23, 2012 09:55
Simple question about pipe flow	husker	Main CFD Forum	1	February 29, 2012 03:40
Pressure Drop - Please Help - Simple Pipe Flow	Joe A.	FLUENT	2	April 23, 2007 07:50
Strange Solution for a simple pipe flow!!	shekharc	Main CFD Forum	4	May 9, 2005 09:21
SIMPLE algorithm for compressible flow	Nabeh	Main CFD Forum	3	June 7, 2001 07:05

November 22, 2012, 03:34		#2
jamesg3373 New Member James Goodwin Join Date: Nov 2012 Location: Liverpool UK Posts: 13 Rep Power: 13	Would love some help with this guys. Or maybe just a point in the right direction? Thanks.