[Mesa-users] resolution study

[Tomasz Plewa]

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=
>

-------------- next part --------------
A non-text attachment was scrubbed...
Name: tplewa.vcf
Type: text/x-vcard
Size: 440 bytes
Desc: tplewa.vcf
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20190311/cbfd1bff/attachment.vcf>