CFD Online Logo CFD Online URL
Home > Forums > NUMECA


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

LinkBack Thread Tools Display Modes
Old   October 11, 2007, 08:57
Posts: n/a

Hope any mathematician can help me.

I am not using a cfd code but using a propriety code (not much inofrmation is avaiable about it) based on two fluid model with staggered mesh scheme. I have used steady state flowrates values as input BC with outlet BC constant at atmospheric pressure, I got results that were far from experimental values.

next I tired putting experimental values (flow rates) as input BC keeping outletBC constant at atmpospheric pr. I also tried the reverse keeping experimental measured time series at outlet and keeping inlet BC (steady state values) at inlet BC. what I want to know is that in both cases there are few scattered high residual peaks in initial simulation till 400s and then the residuals drops down to 10-8 and below. I was wondering whether the trends (of varaibles like P, V etc) obtained in first 500s are the artfacts of these initail high residuals peaks or physics behind the phenomena?

looking forward to hear any suggestion.

  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
High residuals ecram Siemens 3 November 26, 2008 09:19
Residuals converged but high Gilles CFX 2 September 30, 2008 19:05
help high initial residuals Aly FLUENT 0 October 11, 2007 09:04
residuals Karl CFX 2 June 24, 2003 23:13
residuals andrea Siemens 0 March 6, 2002 10:41

All times are GMT -4. The time now is 04:07.