# polynomial profiles

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

 January 11, 2014, 06:08 polynomial profiles #1 Member   EMAVI V SURYA SAMPATH Join Date: Aug 2011 Location: Malaysia Posts: 85 Rep Power: 7 Sponsored Links hi all, can any1 explain me how the coefficients are given in the below link. http://aerojet.engr.ucdavis.edu/flue...ug/node325.htm Will be great full, if any1 can repy lazregenset likes this.

 July 17, 2014, 09:56 hi im soory .have guive mi your tim #2 New Member   lazreg Join Date: Jul 2014 Posts: 9 Rep Power: 5 im same pb how to calcul A1.A2.A3...... http://jullio.pe.kr/fluent6.1/help/html/ug/node282.htm im in the big pb thanks thanks

July 17, 2014, 10:11
#3
Senior Member

François Grégoire
Join Date: Jan 2010
Posts: 389
Rep Power: 10
1. plot the data (e.g. Cp as a function of temperature)
2. right-click on any data point and 'Add Trendline...'
3. choose Linear or Polynomial Order X depending on how well the curve fits the data on the plot
4. click 'Display Equation on chart' and there you have the coefficients

You can do the same overall procedure in a bunch of softwares like Matlab, Octave, Python, etc.

P.S. Asking the same question 10 times in a bunch of threads is not good forum behavior. Ask your question ONCE on the most recent thread that is related or start a new one.
Attached Images
 xy.jpg (25.5 KB, 10 views)

Last edited by macfly; July 17, 2014 at 14:18. Reason: picture added

 July 17, 2014, 12:49 thanks and im soory #4 New Member   lazreg Join Date: Jul 2014 Posts: 9 Rep Power: 5 thanks and im soory fo the methode of the quetion bat how to fand the excel data for density fonction T and a gan thanks

 July 17, 2014, 12:57 #5 Senior Member   François Grégoire Join Date: Jan 2010 Location: Laval University, Canada Posts: 389 Rep Power: 10 I can't find the data for you http://lmgtfy.com/?q=air+density+fun...of+temperature lazregenset likes this.

 July 17, 2014, 13:35 he #6 New Member   lazreg Join Date: Jul 2014 Posts: 9 Rep Power: 5 thanks bat im recherche in the calcul A1.A2..ex Please I need to clarify!!!!!!! donner moi un exemple svp . et je m'excuse pour voutre tomp i need you halp

 July 17, 2014, 14:19 #7 Senior Member   François Grégoire Join Date: Jan 2010 Location: Laval University, Canada Posts: 389 Rep Power: 10 look at post #3, I added a picture that shows everything: http://www.cfd-online.com/Forums/flu...tml#post501994 lazregenset likes this.

 July 17, 2014, 15:28 hi #8 New Member   lazreg Join Date: Jul 2014 Posts: 9 Rep Power: 5 thanks i recherche in thise thanks agan for your tim

 Tags fluent, polynomial profiles

 Thread Tools Display Modes Linear Mode

 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 OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Panboy FLUENT 1 July 17, 2014 09:43 vemps OpenFOAM 0 June 28, 2011 10:22 jason.ryon OpenFOAM 2 May 11, 2011 06:16 shepardsp ANSYS 3 October 17, 2010 14:36 navid STAR-CD 2 April 19, 2010 05:00