Article View: sci.math.num-analysis
Article #141Non-Linear PDE,finite diff meth.
From: solca1
Date: Thu, 30 Jul 1992 17:23
Date: Thu, 30 Jul 1992 17:23
33 lines
1752 bytes
1752 bytes
Hello everyboby
I'm working on Reaction-Transport equation of the type :
a + b <-> c with k1 -> , and k2 in <- direction as rate
constant.
The PDE I get as usual :
dt(Ca(x,t))= D dx**2(Ca(x,t)) -k1Ca(x,t)Cb(x,t) + k2Cc(x,t)
where D=diffusion const, dt=Dt (now D as partial Differential operator)
dx**2 = Dxx (second partial derivative in x) .
Ca(x,t) space-time concentration of specie A ,Cb the same for b .....
Naturally you get the same pdes for Cb(x,t) and Cc(x,t) with little changes.
I have a system of three non-linears PDEs which must solved simultanously .
I have made a simulation on a Cellular Automata of this reaction-transport
process and I'm interested in a numerical solution too. I have planed to use
finite difference method to solve this system of PDE's .The problem is,
must I first do a linearization of the system or can I simply use the usual
algorithm for linear Pde.
If, for instance, you have a linear pde , you use the implicit or the
explicit scheme . Now what happend if your pde is non-linear ,is a $
linearization obligatory or not ? In some books it is said that you can
ungo this linearization, and in other the contrary is not said but
nothing is said about ? If some body have some answers to my questions
it would be glad of you to mail me .Thanks for any suggestion !!
bye Jan .
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Path: arc1-ca.pugleaf.net!sparky!uunet!usc!wupost!gumby!yale!yale.edu!ira.uka.de!chx400!urz.unibas.ch!solca1 From: solca1@urz.unibas.ch Newsgroups: sci.math.num-analysis Subject: Non-Linear PDE,finite diff meth. Message-ID: <1992Jul30.182305.34205@urz.unibas.ch> Date: 30 Jul 92 18:23:05 MET Organization: University of Basel, Switzerland Lines: 38