[petsc-users] SNES-norm is zero all the time

[Stefano Zampini]

Cannot say anything if you don't provide a minimal code we can run to
reproduce the issue

Il giorno mer 3 feb 2021 alle ore 20:07 Sepideh Kavousi <skavou1 at lsu.edu>
ha scritto:

> Hello,
> I have a very stupid problem that I am really ashamed of asking but it has
> been with me for days and I do not know what to do. I want to solve the
> Javier stokes equation with finite difference method. When I wanted to run
> the code, the snes norm value does not change and i get an error for
> timestep convergence. I thought I might do something wrong so,  I tried
> to simplify the equation I want to solve to an easy form, given as:
> u_t=u_x +u_y
> Where _t is the time derivative and _x and _y are the derivative in x and
> y direction. When I want to solve this problem, it still does not do
> anything at all and the snes function norm is zero all the time. I know I
> am missing something but does anyone have any idea what should I check in
> my code.  The answers does not change with time.
> Best,
> Sepideh
>
>
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>


-- 
Stefano
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