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Castro 20.01
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@zingale zingale released this 01 Jan 18:47
20.01
4c613a8

20.01

  • A new option castro.limit_fluxes_on_large_vel has been added. It
    is similar to the existing option limit_fluxes_on_small_dens --
    fluxes are limited to prevent the velocity in any zone from
    getting too high. The largest legal speed is set by
    castro.speed_limit. (#712) This is more general than the previous
    solution proposed by castro.riemann_speed_limit, so that
    parameter has been removed. (#714)

  • The AMR parameter amr.compute_new_dt_on_regrid is now on by
    default. This avoids crashes that result from the CFL number
    being too large after regridding, because we update the
    timestep after seeing that larger velocity. You can still opt
    to set this off if you want to in your inputs file. (#720)

  • We have added calls into Hypre that only exist as of version
    2.15.0, so that is the new minimum requirement for Castro
    radiation. Note that Hypre is now hosted on GitHub at
    https://github.com/hypre-space/hypre.

  • A new option castro.limit_fluxes_on_large_vel has been added. It
    is similar to the existing option limit_fluxes_on_small_dens --
    fluxes are limited to prevent the velocity in any zone from
    getting too high. The largest legal speed is set by
    castro.riemann_speed_limit. (#712)

  • A new option castro.apply_sources_consecutively has been
    added. By default we add all source terms together at once. This
    option, if enabled, adds the sources one at a time, so that each
    source sees the effect of the previously added sources. This can
    matter, as an example, for the sponge source term, which may be
    more effective if it is added after source terms such as gravity
    that update the velocity. (#710)

  • A new option castro.ext_src_implicit has been added. The external
    source terms were previously only implemented as an explicit
    predictor-corrector scheme. The new option, if turned on, changes
    the handling of the external source terms to allow an implicit
    solve. This is done by subtracting the full old-time source and
    adding the full new-time source in the corrector, rather than
    -0.5 and +0.5 of each, respectively. It is still up to the
    individual problem to make sure it is consistent with this scheme
    if the option is turned on. (#709)

  • Add option for using monopole BCs in 3D. By setting
    gravity.max_multipole_order to a negative number, you can use
    monopole gravity to fill the boundary conditions, rather than the
    multiple BCs. This is useful for debugging purposes. To make the
    behavior consistent, we now use multipole BCs by default in 2D as
    well. (#716)

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