Re: [Libmesh-users] What does the Newton term mean in ex13?

[John P. <jwp...@gm...>]

On Mon, Jan 30, 2012 at 10:59 AM, Bao Kai <pae...@gm...> wrote:
> Hi, John,
>
> Thank you for your helpful response.
>
> Since the lid driven cavity problem is actually a steady problem, it
> seems that always the steady result will be obtained after the
> non-linear iteration, which also means we get the final result in the
> first time step. Is it right?

Not in general, no.

The lid driven cavity has a steady state solution (for some Re) but we
solve it in ex13 using a transient algorithm and time derivative terms
are present in the PDE.

The parameters (delta_t and Re) used in ex13 cause it to converge to
steady state quite quickly, but certainly not in 1 timestep.

-- 
John