[FLASH-USERS] Changing Gamma (eos)

[Anshu Dubey]

Hi Seyit,

In FLASH 2.5 you need to make that change in eos1d.F90 also.

Anshu

Anshu

> Hi Anshu,
>
> I am using FLASH2.5 and it might be a little different to version 3.0.
> Though I have tried to change things in eos.F90, but the unfortunate
> thing is that (pretty sure) eos.F90 is not called at every timestep
> 'dt'. It is (might be) only used when initializing the blocks. This is
> of no use to me. I want to update gamma like you say at every timestep
> (gamma will be dependant on temperature and density basically).
>
> In Flash2.5, the eos.F90 is in "source/materials/eos/gamma/".
>
> Btw. I am using a module eos1d inside my "init_block.F90" file. Of
> course, changing the formula of gamma there isn't helping.
>
> Thanks,
> Seyit
>
>
>> Hi Seyit,
>>
>> This feature is not a part of FLASH default behavior. If you are using
>> FLASH3 then you have two options. The value of gamma in Eos is carried
>> in a variable called eos_gamma, which is defined in the data module for
>> the Eos unit, in file "source/physics/Eos/EosMain/Eos_data.F90".
>> Normally
>> this variable is initialized in Eos_init, and then used in "Eos.F90".
>> Your first and simplest option is to add a line
>> at the beginning of "Eos.F90" to update the eos_gamma value at each time
>> step. You can fetch the value of dt by calling the function
>> "Driver_getDt".  If you need time dependent gamma for only one
>> setup, then the better option is to place a copy of Eos.F90 in the
>> simulation directory and modify that file as described above. That way
>> you won't have to worry about the source tree when you get later
>> versions of FLASH.
>>
>> Anshu
>>
>>
>>> Hi all,
>>>
>>> I have a simple question. I want to put a changing gamma in my
>>> simulation. e.g. a gamma which changes and depends on dt. Where to
>>> change this formula of gamma?
>>>
>>> I can't locate it in the database.
>>>
>>> Thanks,
>>> Seyit
>>>
>>>
>