[mesa-users] Results changing while rerunning the same problem

[Bill Paxton]

Hi,

I still don't understand.   You do two runs with the same inlist.  At what model number do the results first differ?  model 1?  model 10000?

Can you repeat this?  Or does it happen randomly?

Does it still happen when you set OMP_NUM_THREADS 1

-B



On Jan 15, 2013, at 4:03 PM, trobolo dinni wrote:

> Hi Bill,
> 
> I attached the namelist I am using, I have not starting models since I rerun the same simulation from the beginning.
> 
> Starting from the model number reached at the end of the simulation (15295 the first time and 12835 the second), every physical variable of the star I was simulating was different.
> I am stopping the simulations at the He flash, using the criterion suggested me by Aaron Dotter in a previous discussion, which consists in setting up the "power_he_burn_upper_limit" control to 1d4 or so. Hence is like the star reaches the He flash at different moments in different simulations.
> 
> I am using mesasdk to compile mesa, it uses gfortran 4.7.2; I am running the code in 64 bit linux (Ubuntu 12.04.1 LTS) box; the mesa version is the 4740.
> 
> Sorry for the lack of information in my first email!
> Thanks for the help,
>                                 Roberto
> 
> 
> 2013/1/16 Bill Paxton <paxton at kitp.ucsb.edu>
> Hi,
> 
> Please provide the necessary info for us to try to reproduce the problem.
> That means inlists and starting model if any.
> And exact details about what you notice as different.
> Also, what compiler and what system and what version of mesa.
> 
> -B
> 
> 
> 
> 
> 
> 
> 
> On Jan 15, 2013, at 3:36 PM, trobolo dinni wrote:
> 
> > Dear MESA users,
> >
> > I have got a simple weird problem: I run the same simulation twice, and I am getting two different results.
> >
> > I know it does not depends on the code, but I would like to ask if anyone noticed the same behavior and if it can depend on my computer or if I have to do something particular before running again the same simulation in the same directory.
> >
> >
> > Thanks,
> >                 Roberto
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> <inlist.1M-preMS_RGBtip-sb_rot_0.3_from_ZAMS>

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