[firedrake] Output for time-stepping?

[Anna Kalogirou]

Yes the vtu files are necessary (I tried deleting them to check if the 
pvd would work, but it didn't).

Anna.

On 13/11/15 12:14, Justin Chang wrote:
> Lawrence,
>
> So the first option is what I have been doing. Yes only one pvd is 
> created. But what ends up also happening is that I get hundreds of 
> .vtu files. Are those files necessary for pvd to work? Sorry I am not 
> in front of my computer so I can't test any of this out yet.
>
> Thanks,
> Justin
>
> On Friday, November 13, 2015, Lawrence Mitchell 
> <lawrence.mitchell at imperial.ac.uk 
> <mailto:lawrence.mitchell at imperial.ac.uk>> wrote:
>
>
>     > On 13 Nov 2015, at 11:47, Justin Chang <jychang48 at gmail.com
>     <javascript:;>> wrote:
>     >
>     > Hi all,
>     >
>     > So I am running simulations which have many time steps and
>     normally I would save the files as .pvd via outfile << File(...).
>     This creates a new file for each time level
>     >
>     > However, if I need to solve a large geochemistry system of
>     equations (~20 unknowns) over 100+ time steps, I would prefer not
>     to have 2000+ pvd files sitting my file system/laptop. Is there a
>     way to store the solution of all time levels into a single file?
>
>
>     You can store multiple time steps, of the same Function, in a
>     single pvd file:
>
>     out = File("foo.pvd")
>
>     for i in range(200):
>        ...
>        out << f
>
>     If you also want to store the timestep in the file, do:
>
>     for i in range(200};
>        ...
>        out << (f, t)
>
>     Where t is the current timestep.
>
>     You cannot, however, store /different/ functions in the same
>     file.  So you'll presumably need one pvd per unknown. However,
>     this is hopefully better than one per timestep as well.
>
>     Cheers,
>
>     Lawrence
>
>
>
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-- 
  
  Dr Anna Kalogirou
  Research Fellow
  School of Mathematics
  University of Leeds

  http://www1.maths.leeds.ac.uk/~matak/

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