CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > CFX

RMS fluctuation

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

LinkBack Thread Tools Display Modes
Old   April 8, 2013, 10:44
Default RMS fluctuation
New Member
Join Date: Apr 2013
Posts: 4
Rep Power: 6
saeedabedi is on a distinguished road
Hi all

I am attempting to simulate flow over a submnarine at a constant speed.

I am using ANSYS CFX, k omega or SST turbulence model, A structured mesh with icem.

When I have coarse mesh it solves and RMS residual converges however when I have fne mesh RMS residual will not converge and there is fluctuation in RMS.

Can anyone offer some advice from previous expeience?


saeedabedi is offline   Reply With Quote

Old   April 8, 2013, 18:22
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 14,326
Rep Power: 110
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Here's plenty of advice:

Your comments agree with the expected behaviour described in this FAQ.
ghorrocks is online now   Reply With Quote


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
how to calculate rms velocity fluctuation after runtime nati OpenFOAM Post-Processing 6 February 7, 2013 09:42
RMS P-mass no-convergence for low pressure ration,low rotor speed turbine Ton CFX 3 November 6, 2010 07:21
RMS Res. is the smaller the best? Anderson T F CFX 10 September 12, 2007 05:59
Urgent help: RMS problem!!! Anh CFX 4 September 8, 2007 13:47
What's wrong with my RMS profile in LES Jiang Ning FLUENT 0 March 31, 2005 05:30

All times are GMT -4. The time now is 01:34.