[Mesa-users] resolution study
amber lauer
amberlauer at gmail.com
Mon Mar 11 12:28:37 EDT 2019
Hey, guys, not sure what ideological debate I've stumbled into here, I
think it's a bit over my head.
Obviously simplifying the mesh is not my ideal scenario, but I'm planning
on running a grid of many ~1000 models and am trying to make use of local
(free) resources as best I can in order to prove I have a useful idea. But,
even with my reduced mesh, I'm fairly confident that it will be an
improvement on previous work, and therefore is still useful, albeit with a
full explanation of limitations and assumptions.
I would echo the statement about "all models are wrong, some are useful".
Thanks to Aaron and Frank, I will make use of your information. For those
also seeking this information, I figured out where I remembered seeing such
materials. In our Simulating Stars Summer School in China last year,
Manos's minilab 1 provides information on the topic (
http://www.stellar-astrophysics.org/material.html).
Thanks all.
On Mon, Mar 11, 2019 at 8:42 AM Tomasz Plewa via Mesa-users <
mesa-users at lists.mesastar.org> wrote:
> To state the obvious, there is no substitute for reality. The idea of
> model reduction offers capturing only certain amount of the full model
> behavior, and the full model is itself only a representation of reality.
> As someone said once, "all models are wrong, but some are still useful."
>
> https://en.wikipedia.org/wiki/All_models_are_wrong
>
> Tomek
> --
> On 3/10/19 1:55 PM, David Arnett via Mesa-users wrote:
> > I disagree.
> >
> > On Sat, Mar 9, 2019 at 8:33 PM Francis Timmes <fxt44 at mac.com
> > <mailto:fxt44 at mac.com>> wrote:
> >
> > epicycles have a long history.
> >
> > if it were easy to take results from the restricted range that
> > explicit multi-d hydrocodes can explore and mold them into forms
> > suitable for some/many/all aspects of stellar evolution, it probably
> > would have been done by now. so its a hard problem awaiting
> > copernicus.
> >
> > fxt
> >
> >
> >
> >
> > > On Mar 8, 2019, at 6:13 PM, David Arnett <wdarnett at gmail.com
> > <mailto:wdarnett at gmail.com>> wrote:
> > >
> > > There has been a lot of progress in simulations of convection,
> > mixing, and turbulence in stars, and in asteroseismology. There is
> > a history of introducing new, additional parameters for each new
> > test; It might be good to have a wide-ranging and critical look at
> > algorithms and tests, to decide what we think we really know and
> > what we merely fit by parameter adjustment.
> > >
> > > On Fri, Mar 8, 2019 at 5:02 PM Francis Timmes via Mesa-users
> > <mesa-users at lists.mesastar.org
> > <mailto:mesa-users at lists.mesastar.org>> wrote:
> > > hi amber,
> > >
> > > usually this topic is emphasized during the labs in a mesa
> > summer school,
> > > and one year we had an evening session on the subject. i cannot
> > recall
> > > a write-up or stored presentation outside of a mesa instrument
> > paper
> > > or other science paper (e.g.,
> > https://ui.adsabs.harvard.edu/?#abs/2016ApJS..227...22F
> > <
> https://urldefense.proofpoint.com/v2/url?u=https-3A__ui.adsabs.harvard.edu_-3F-23abs_2016ApJS..227...22F&d=DwMFaQ&c=HPMtquzZjKY31rtkyGRFnQ&r=BAkmbcCLNe7YO36WZjdRtg&m=Vc5dEUpPx25leryY8QROEOuZ-WlDUBCqjpYvY4Sf_rU&s=X88yRxPm5m4n1lARbfT0qS3-Qbanas7UrYscvQ77bvY&e=
> >),
> > > so i'm not too surprised you didn't find one. i'll take a shot
> > at crafting
> > > a verification-with-mesa message, or at least how i do it.
> > >
> > > fxt
> > >
> > >
> > >
> > >
> > > > On Mar 8, 2019, at 3:00 PM, amber lauer via Mesa-users
> > <mesa-users at lists.mesastar.org
> > <mailto:mesa-users at lists.mesastar.org>> wrote:
> > > >
> > > > I've searched the mailing list archives, as well as the
> > educational materials on the marketplace, and I can't find
> > something I know existed.
> > > >
> > > > At one time there were instructions, possibly a tutorial, on
> > how to do convergence and resolution studies, and just various
> > in-depth explanations of adjustments to these variables.
> > > >
> > > > I've exhausted the resourcess I know of. Can anyone help? Thanks.
> > > >
> > > > --
> > > > Amber Lauer
> > > > Postdoctoral Researcher
> > > > Triangle Universities Nuclear Lab
> > > > Duke University
> > > > amber.lauer at tunl.duke.edu <mailto:amber.lauer at tunl.duke.edu>
> > > > _______________________________________________
> > > > mesa-users at lists.mesastar.org
> > <mailto:mesa-users at lists.mesastar.org>
> > > > https://lists.mesastar.org/mailman/listinfo/mesa-users
> > <
> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.mesastar.org_mailman_listinfo_mesa-2Dusers&d=DwMFaQ&c=HPMtquzZjKY31rtkyGRFnQ&r=BAkmbcCLNe7YO36WZjdRtg&m=Vc5dEUpPx25leryY8QROEOuZ-WlDUBCqjpYvY4Sf_rU&s=dzYm8EeVAXTbkSfmAgjiMVMUOacXvyBtnmtRUrNzoAg&e=
> >
> > > >
> > >
> > > _______________________________________________
> > > mesa-users at lists.mesastar.org <mailto:
> mesa-users at lists.mesastar.org>
> > > https://lists.mesastar.org/mailman/listinfo/mesa-users
> > <
> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.mesastar.org_mailman_listinfo_mesa-2Dusers&d=DwMFaQ&c=HPMtquzZjKY31rtkyGRFnQ&r=BAkmbcCLNe7YO36WZjdRtg&m=Vc5dEUpPx25leryY8QROEOuZ-WlDUBCqjpYvY4Sf_rU&s=dzYm8EeVAXTbkSfmAgjiMVMUOacXvyBtnmtRUrNzoAg&e=
> >
> > >
> > >
> > >
> > > --
> > > David Arnett
> > > Regents Professor
> > > Steward Observatory
> > > University of Arizona
> > >
> > > Facts are stubborn, but statistics are more pliable. Mark Twain
> > > Facts do not cease to exist because they are ignored. Aldous Huxley
> >
> >
> >
> > --
> > David Arnett
> > Regents Professor
> > Steward Observatory
> > University of Arizona
> >
> > Facts are stubborn, but statistics are more pliable. Mark Twain
> > Facts do not cease to exist because they are ignored. Aldous Huxley
> >
> > _______________________________________________
> > mesa-users at lists.mesastar.org
> >
> https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.mesastar.org_mailman_listinfo_mesa-2Dusers&d=DwICAg&c=HPMtquzZjKY31rtkyGRFnQ&r=BAkmbcCLNe7YO36WZjdRtg&m=Vc5dEUpPx25leryY8QROEOuZ-WlDUBCqjpYvY4Sf_rU&s=dzYm8EeVAXTbkSfmAgjiMVMUOacXvyBtnmtRUrNzoAg&e=
> >
>
> _______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>
>
--
Amber Lauer
Postdoctoral Researcher
Triangle Universities Nuclear Lab
Duke University
amber.lauer at tunl.duke.edu <amber.lauer at duke.edu>
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