solver for non-linear systems

March 15, 2002, 16:46

I am one beginner in CFD. Now I have bunch of coupled non-linear equations, and I have to solve them simultanousluy? Is there any solver possible for this case?Or if you have other suggestions?

March 16, 2002, 01:38

It depends on the equations, would you put the equations?

March 17, 2002, 22:37

Try Newton's method for Non-linear systems. When using any numerical methods e.g. Newton's method, it also incorporate another type of numerical methods, i.e. solving matrix systems. Care should be exercised to minimize error in inversion or transformation which affects the overall accuracy of the numerical method you are using. Any good numerical methods book should have it. Or to make your life EASIER... try MathCAD5Plus

MathLAB both of these software will solve non-linear systems of equation. Go with the Flow, Edward

March 15, 2002, 16:46	solver for non-linear systems	#1
phonix Guest Posts: n/a	I am one beginner in CFD. Now I have bunch of coupled non-linear equations, and I have to solve them simultanousluy? Is there any solver possible for this case?Or if you have other suggestions?

March 16, 2002, 01:38	Re: solver for non-linear systems	#2
Junseok Kim Guest Posts: n/a	It depends on the equations, would you put the equations?

March 17, 2002, 22:37	Re: solver for non-linear systems	#3
edward g. cruz Guest Posts: n/a	Try Newton's method for Non-linear systems. When using any numerical methods e.g. Newton's method, it also incorporate another type of numerical methods, i.e. solving matrix systems. Care should be exercised to minimize error in inversion or transformation which affects the overall accuracy of the numerical method you are using. Any good numerical methods book should have it. Or to make your life EASIER... try MathCAD5Plus MathLAB both of these software will solve non-linear systems of equation. Go with the Flow, Edward

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Need help with boundary conditions: open to atmosphere	Wolle	OpenFOAM	2	April 11, 2011 07:32
Inversion of large sparse linear systems	pankos	Main CFD Forum	4	June 24, 2010 06:24
What's the difference between a linear and a nonlinear solver?	bearcat	Main CFD Forum	1	February 5, 2010 07:11
free C code for large sparse matrix linear solver	ztdep	Main CFD Forum	7	May 24, 2007 14:14
solver for linear system with large sparse matrix	Yangang Bao	Main CFD Forum	1	October 25, 1999 04:22