CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Quick question: Does this residual plot mean the presence of unsteadiness?

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree1Likes
  • 1 Post By aalzoubi06

LinkBack Thread Tools Display Modes
Old   April 1, 2015, 10:48
Default Quick question: Does this residual plot mean the presence of unsteadiness?
Buddha's fight
Join Date: Mar 2013
Posts: 42
Rep Power: 4
nvarma is on a distinguished road
Hi, (see attached image)
This is from a steady state run for natural convection. Does this mean there's a vortex near the boundary or somewhere within the flow field, because of the oscillatory behavior of the residuals?

So should I be doing a transient analysis?

nvarma is offline   Reply With Quote

Old   April 1, 2015, 14:00
New Member
Ahmad Al-Zoubi
Join Date: Nov 2013
Posts: 13
Rep Power: 3
aalzoubi06 is on a distinguished road
Please run the case for some few thousands of iterations to see what will happen later.
Besides, it is good to monitor at least one relevant variable with time and see if there is a transient behavior in its value. Please note that in order to say that you solution is converged one should check the mass imbalance (difference between mass flow rate at inlets & mass flow rate at outlets).

All the best and success
nautilus88 likes this.
aalzoubi06 is offline   Reply With Quote


convergence, residuals fluent

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cannot run the code properly: very large time step continuity error crst15 OpenFOAM Running, Solving & CFD 9 December 14, 2014 19:17
rhoSimplecFoam Mach0.8 no pressure values CFDnewbie147 OpenFOAM Running, Solving & CFD 16 November 23, 2013 06:58
SLTS+rhoPisoFoam: what is rDeltaT??? nileshjrane OpenFOAM Running, Solving & CFD 4 February 25, 2013 05:13
Floating point exception error Alan OpenFOAM Running, Solving & CFD 10 April 6, 2012 14:02
Orifice Plate with a fully developed flow - Problems with convergence jonmec OpenFOAM Running, Solving & CFD 3 July 28, 2011 05:24

All times are GMT -4. The time now is 06:23.