Hello- Why the continuity residual never decreases below 1e-3?

Jorg · August 28, 2012, 17:26

Hi, im performing a set of simulations on an subsonic elliptical airfoil and i´ve noted that the only residual that is not reaching the desired tolerance is the continuity one, it never goes below 1e-3? can there be a reason for it, does it means that the simulation setup is wrong?

siara817 · August 29, 2012, 04:21

I think it is nice to stop other solvers and let the continuity solver work lonely. Then see if it converges very well or not. If again it did not converge well, you need to check your mesh quality.

Jorg · August 29, 2012, 08:01

Ok; abut the mesh quality I am focusing on three indicators, this are element quality, aspect ratio and element skewness, besides my mesh is elliptical and structured, so ill try to check that continuiti solver.

August 28, 2012, 17:26	Hello- Why the continuity residual never decreases below 1e-3?	#1
Jorg New Member Jorge Tamayo Join Date: Jul 2012 Location: Delft, Netherlands Posts: 16 Rep Power: 13	Hi, im performing a set of simulations on an subsonic elliptical airfoil and i´ve noted that the only residual that is not reaching the desired tolerance is the continuity one, it never goes below 1e-3? can there be a reason for it, does it means that the simulation setup is wrong?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
High Courant Number @ icoFoam	Artex85	OpenFOAM Running, Solving & CFD	11	February 16, 2017 13:40
Extrusion with OpenFoam problem No. Iterations 0	Lord Kelvin	OpenFOAM Running, Solving & CFD	8	March 28, 2016 11:08
How to write k and epsilon before the abnormal end	xiuying	OpenFOAM Running, Solving & CFD	8	August 27, 2013 15:33
Orifice Plate with a fully developed flow - Problems with convergence	jonmec	OpenFOAM Running, Solving & CFD	3	July 28, 2011 05:24
Could anybody help me see this error and give help	liugx212	OpenFOAM Running, Solving & CFD	3	January 4, 2006 18:07

August 29, 2012, 04:21		#2
siara817 Senior Member siamak rahimi ardkapan Join Date: Jul 2010 Location: Copenhagen, Denmark Posts: 220 Rep Power: 17	I think it is nice to stop other solvers and let the continuity solver work lonely. Then see if it converges very well or not. If again it did not converge well, you need to check your mesh quality.

August 29, 2012, 08:01		#3
Jorg New Member Jorge Tamayo Join Date: Jul 2012 Location: Delft, Netherlands Posts: 16 Rep Power: 13	Ok; abut the mesh quality I am focusing on three indicators, this are element quality, aspect ratio and element skewness, besides my mesh is elliptical and structured, so ill try to check that continuiti solver.