[FLASH-USERS] initial density and temperature distribution in laser slab

[Kavin Tangtartharakul]

Hi Leland,

Thank you for pointing me in the right direction!
I gave it a try and there seems to be some strange behavior with the
density. Below, I set some arbitrary functions for the density and electron
temperature.  It seems like the initial temperature distribution is as
expected but the density does something unexpected.  The density only
worked when I had a constant value for it.
[image: image.png]

Below are what the initial temperature and density look like.  Any idea
what is causing this behavior in the density?

Thank you,
Kavin Tangtartharkaul

[image: image.png]
[image: image.png]

On Wed, Jul 17, 2024 at 4:07 PM Lee Ellison <lee at pacificfusion.com> wrote:

> Hi Kavin,
>
> Take a look at Simulation_initBlock.F90. This is the Fortran routine that
> specifies the initial condition for the problem. Take a look around line
> ~100 for the body of a loop over the mesh that is specifying the initial
> state.  You can modify this to put in whatever spatial dependence you like.
>
> Best of luck!
> Lee
> ________________
> Leland Ellison PhD
> Pacific Fusion
> Lead - Modeling and Simulations
>
> On Wed, Jul 17, 2024 at 3:41 PM Kavin Tangtartharakul <ktangtar at ucsd.edu>
> wrote:
>
>> Hi,
>>
>> I am a new user of flash and have started working with the LaserSlab
>> example.  Instead of just a single value fo the initial density or
>> temperature, how can I specify the density or temperature as a function of
>> position? For example, density = dens_base + alpha*y.
>>
>> Thank you,
>> Kavin Tangtartharakul
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>
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