[mesa-users] Adding an energy term

[Aaron Dotter]

P.S.  I should not have said ODE!  PDE or DAE.

Aaron


On Mon, May 19, 2014 at 9:07 PM, Aaron Dotter <aaron.dotter at gmail.com>wrote:

> Hi Liron,
>
> MESA is doing an implicit integration of the ODE; it generally requires
> more than one iteration per timestep to reach convergence.  Depending on
> how hard the current problem is, that number can be a few or more.  Each
> iteration is the construction of a complete model, which includes a call to
> your extra routine.  The terminal output shows the number of iterations as
> "iters", 2nd row and 2nd from the right.  I think that's all there is to it
> in this case.
>
> Cheers,
> Aaron
>
>
> On Mon, May 19, 2014 at 7:02 PM, Liron Mcley <lironmc at tx.technion.ac.il>wrote:
>
>> Hi everyone,
>>
>> So I'm trying to add extra heat in a specific radius at a certain time.
>> I'm currently just playing with the code but I came across something
>> perplexing. What I did was this - I used the instructions in
>> star/other/other_energy.f to add a subroutine to src/run_star_extras.f in
>> my working directory that would add extra heat according to some
>> parameters. I attached the run_star_extras.f file. I also attached a screen
>> shot of the terminal while it was running, terminal_PrtScn.png .
>> The perplexing thing is that the code seems to call the energy_routine 3
>> times in each time step. What does this mean?? The energy is meant to be
>> added only once every time step.
>>
>> Also, I was wondering whether it is possible to add a pressure term to
>> the code. I tried going through the eos module for ideas, but got
>> completely lost in the code..
>>
>> Thank you,
>> Liron Mcley
>>
>>
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