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[WIP] reduce species_failure_tolerance default from 1.e-2 to 1.e-4#1970

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[WIP] reduce species_failure_tolerance default from 1.e-2 to 1.e-4#1970
zingale wants to merge 3 commits into
AMReX-Astro:developmentfrom
zingale:change_species_threshold_default

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@zingale

@zingale zingale commented Mar 26, 2026

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the value should be close to atol_spec to prevent large negative mass fractions from building up and becoming too big to handle.

this is a more sensible value.

the value should be close to atol_spec to prevent large negative mass
fractions from building up and becoming too big to handle.
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