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

Polynomial Root finding

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

LinkBack Thread Tools Display Modes
Old   April 29, 2004, 17:20
Default Polynomial Root finding
Posts: n/a
Does anyone know of a numerical/algebraic method to find the largest real root of a polynomial? References are appreciated.

Thank you.
  Reply With Quote

Old   April 30, 2004, 01:06
Default Re: Polynomial Root finding
Posts: n/a
Title: Roots of polynomials by ratio of successive derivatives Author(s): Crouse, J. E. (NASA Lewis Research Center, Cleveland, OH, United States); Putt, C. W. (NASA Lewis Research Center, Cleveland, OH, United States) Date: 1972 Citation: NASA-TN-D-6793
  Reply With Quote

Old   May 4, 2004, 05:42
Default Re: Polynomial Root finding
Posts: n/a
have a look at "Numerical Recipes"
  Reply With Quote

Old   May 4, 2004, 11:46
Default Re: Polynomial Root finding
Posts: n/a
Thanks guys,

Let me first explain why I need to solve a polynomial eqn. Reference JFM(2000), vol.415, pp.261-284 "A scale-dependent dynamic model for LES". I want to solve eqn. (3.14) which is a polynomial of degree 5. But I only need the largest, real, positive root. In the paper they solve this using a Newton-Raphson method. I wanted to know if there is a ready-made subroutine that will give me the largest real root.

  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
Finding root of a function hjasak OpenFOAM Programming & Development 4 August 10, 2016 11:16
OpenFOAM-1.7.0 for CentOS/RHEL/SL 5.x 64bit released linnemann OpenFOAM Installation 66 October 26, 2013 13:04
Installation problem with ParaView 3.8.0 on openSUSE 11.2 aero_ OpenFOAM Paraview & paraFoam 14 August 2, 2010 18:13
Excel like goal-seek type functionality in OpenFOAM benk OpenFOAM 3 April 30, 2010 16:50
MPI PROBLEMS gtg627e OpenFOAM Running, Solving & CFD 20 October 5, 2007 04:02

All times are GMT -4. The time now is 13:18.