Time intervals for plt and chkpt output

[mbkuhn]

• instead of outputting at specified intervals of timesteps, this enables outputting at specified intervals of time
• this is an enabling feature for adaptive dt simulations and is key to making normal-looking videos when dt varies significantly with time (such as with breaking waves)
• the implementation includes the option to enforce dt to adhere to the plotting or checkpointing time intervals specified; otherwise the program will output the first plotfile or checkpoint after the time interval is passed
• also allows the maximum growth of dt (in adaptive dt simulations) to be an input parameter
• includes unit tests and abort statements for combinations of parameters that do not make sense

[marchdf]

@mbkuhn have you looked into amr.plot_per? https://github.com/AMReX-Codes/amrex/blob/development/Src/Amr/AMReX_Amr.H#L122 That might be more relevant to an AmrLevel than AmrCore but it might be worth looking at how it is done there and follow similar thing?

[mbkuhn]

@mbkuhn have you looked into amr.plot_per? https://github.com/AMReX-Codes/amrex/blob/development/Src/Amr/AMReX_Amr.H#L122 That might be more relevant to an AmrLevel than AmrCore but it might be worth looking at how it is done there and follow similar thing?

Thanks for sharing this example! My setup of the dt enforcement is very similar to the amrex code. For the plotfile and checkpoint outputs, I mimicked part of a code from my PhD research group: https://github.com/desjardi/NGA2/blob/master/src/libraries/event_class.f90#L61 . Both are pretty similar conceptually.