[mesa-users] 15Msun MESA explosion

Fri Jun 12 15:28:24 EDT 2015

Hi,

A quick check shows a problem in my somewhat-out-of-date inlist_adjust that converts from 204 isos to 22. But I do have an old saved model from when that inlist was working, so lets just skip ahead to inlist_remove_core using this starting model.  

The remove-core inlist runs very quickly.

The energy deposition takes longer, but with the small net it isn't too long -- for me, it stops in a few minutes after 364 steps

The explosion run is of course the most time consuming.  How long it takes depends on how far you want to follow the shock.  Keep in mind that we are not yet prepared to deal with the complexities of surface shock break-out, so you'll need to stop before then.

Cheers,
Bill

On Jun 12, 2015, at 12:01 PM, Bill Paxton wrote:

> Hi Manos & Tug,
> 
> Please note that the post core collapse runs in section 6.2 all start with a saved onset-of-core-collapse model saved when infall speed reaches 1000 km/sec.  Then there are a series of preparation inlists that remove the core and deposit energy to launch the explosive shock.  See the inlists for section 6.2 figures.   
> 
> >>>>> GAK!!!! I just discovered that the inlists for section 6.2 are not yet posted!!!!  Sorry for that oversight.
> 
> Until that is fixed (soon!), here are some temporary replacements for you to play with if you are interested in getting started now (understanding that these may not be exactly the best way to do things).
> 
> I have a test directory ccsn_15M in a working directory just below mesa/star.  It has these inlists and a saved starting model that uses the full 204 iso net.
> 
> <cc_15m_204i.mod>
> 
> <inlist>
> run the following inlists in order by making the appropriate edits to the main inlist
> 
> inlist_adjust -- loads the 204 iso starting model and changes it to use approx21_cr60_plus_co56.net.
> <inlist_adjust>
> 
> inlist_remove_core -- remove iron core at 1.5Msun
> <inlist_remove_core>
> 
> inlist_prepare_and_edep -- inject energy to start shock
> 	enough to give total energy of 1.25e51, injected in 0.05 seconds uniformly in 0.02 Msun at base
> <inlist_prepare_and_edep>
> 
> inlist_explosion -- load the model after energy injection and let it run
> <inlist_explosion>
> 
> Let me know if you decide to try this.
> 
> Cheers,
> Bill
> 
>  
> 
> 
> On Jun 12, 2015, at 11:33 AM, Tuguldur Sukhbold wrote:
> 
>> Manos,
>> 
>> I am about to play with it as well, but haven't started yet. Did you try removing the limiter? i.e.:
>> 
>> fe_core_infall_limit = 1d99 ! cm/sec
>> 
>> when I look at section 4 inlists, this seems to be switching to the "hydro mode". 
>> 
>> Tuguldur
>> 
>> On Fri, Jun 12, 2015 at 9:57 AM, Manos Chatzopoulos <manolis at flash.uchicago.edu> wrote:
>> Dear MESA community,
>> 
>> I downloaded the inlists corresponding to Section 6 of the instrument
>> paper (on the 15Msun explosion) and run them with the latest
>> version of MESA (7624). The only thing I changed in the inlist was the
>> nuclear reaction network to approx21_cr60_plus_co56.net in order
>> to get a faster run and turned the Ledoux criterion to "false"
>> (experimentally). The calculation run up to step number 3848
>> and then terminated with the message "fe_core_infall_limit" , "stop
>> because fe_core_infall > fe_core_infall_limit". Shouldn't with the new
>> MESA Hydro mode be advanced past that phase and toward SN shock
>> propagation after collapse? Am I missing something? Again the inlists
>> are exactly the same minus the reaction network and the convection
>> criterion (that I think for this experimental run shouldn't matter in
>> terms of switching to hydro).
>> 
>> Thanks!
>> 
>> Manos
>> 
>> --
>> Dr. Emmanouil Chatzopoulos
>> Enrico Fermi Postdoctoral Fellow
>> Department of Astronomy & Astrophysics
>> FLASH Center for Computational Science
>> University of Chicago
>> https://www.linkedin.com/pub/manos-chatzopoulos/a1/688/a03
>> https://astro.uchicago.edu/people/manos-chatzopoulos.php
>> 
>> 
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