[firedrake] Output for time-stepping?

[Justin Chang]

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?

Thanks,
Justin
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