velocity profile concave

ramana468 · March 6, 2014, 07:54

Dear All,
I am simulating laminar flow in annular region between two cylinders with constant heat flux at inner wall. Temperature profile Vs. Axial location at any given radial location is as shown below. Using buoyantSimpleFoam solver.

Any explanation why it is getting flatter near outlet (tried both options of inletOutlet or zeroGradient).

Thanks in advance for help.
regards
ramana

ramana468 · March 28, 2014, 07:27

HI,
waiting for some solution please
regards

wyldckat · March 30, 2014, 08:31

Greetings Ramana and welcome to the forum!

Unfortunately you have not given us much information to work with. Please follow the instructions given here: How to give enough info to get help

Because the only guess I'm able to do is that the mesh is incorrectly defined for your case.

Best regards,
Bruno

ramana468 · April 1, 2014, 04:32

Dear Bruno,
Thanks for your reply. I searched for possible problem with meshing. But could not find.

But, I could solve the problem. The problem is with convergence criterion and the temperature profile did not converge, though the code seem to be saying "converged".
after improving convergence criterion, I could attain the temperature profile which is realistic.

Thanks for your reply
regards
ramana

March 30, 2014, 08:31		#3
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Greetings Ramana and welcome to the forum! Unfortunately you have not given us much information to work with. Please follow the instructions given here: How to give enough info to get help Because the only guess I'm able to do is that the mesh is incorrectly defined for your case. Best regards, Bruno __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

April 1, 2014, 04:32	could solve the problem	#4
ramana468 New Member vrikkurthi Join Date: Feb 2014 Posts: 3 Rep Power: 12	Dear Bruno, Thanks for your reply. I searched for possible problem with meshing. But could not find. But, I could solve the problem. The problem is with convergence criterion and the temperature profile did not converge, though the code seem to be saying "converged". after improving convergence criterion, I could attain the temperature profile which is realistic. Thanks for your reply regards ramana

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March 28, 2014, 07:27		#2
ramana468 New Member vrikkurthi Join Date: Feb 2014 Posts: 3 Rep Power: 12	HI, waiting for some solution please regards