> This could be useful to solve Euler equation with a DG method that
> employs a Riemann solver to compute the numerical fluxes
> (discontinuous at element faces-edges) without dealing with Godunov
> fluxes to compute the jacobian... Am I wrong?
Absolutely. And a common trick from the finite volu
This could be useful to solve Euler equation with a DG method that
employs a Riemann solver to compute the numerical fluxes
(discontinuous at element faces-edges) without dealing with Godunov
fluxes to compute the jacobian... Am I wrong?
Lorenzo
2008/2/1, Benjamin Kirk <[EMAIL PROTECTED]>:
>
> >
> Let me rewrite the expression you wrote as
>
> J*v = (F(u+epsilon*v)-F(u)) / epsilon
>
> Where epsilon is a small perturbation and F(u) is the nonlinear residual
> function and J is the jacobian matrix of the nonlinear system. The above
> formula compute the action of a Jacobian on a given vec
ahadevan
Cc: [email protected]
Subject: Re: [Libmesh-users] matrix free scheme
thanx a lot!
Can you write me the exact expression of the problem
you're solving?
Recently,
I read the paper of Knoll about JFNK method
(Jacobian-free NewtonKrylov methods: a survey of
approaches
thanx a lot!
Can you write me the exact expression of the problem
you're solving?
Recently,
I read the paper of Knoll about JFNK method
(Jacobian-free NewtonKrylov methods: a survey of
approaches and applications). I'm not sure whether I
understood well. Please correct me.
If r_0 is the first resi
I've attached the message from Ben Kirk. Also attached is the example
program that he sent out. See below for his original mail.
On a side note, I have written a working code with Matrix-free technique to
solve a nonlinear, transient diffusion-reaction problem. It still needs few
refinements and I
Dear all,
I remember that there was a discussion about matrix
free scheme with libmesh before X'mas. I'd like to ask
if somebody has got a example code for this.
thanx
pan
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