[FLASH-USERS] Problem with pressure matching in HEDP simulation (Steffen Sander)

[李芳]

Hi，
I‘v got this problem when the mpi version for compiling the hdf5 is not consitent with the mpi version actually used in the simulation. 
you can check the config.log file in your hdf5 sources if your system have more than one mpi installed. Hope this message can help.


best wishes!
Fang



At 2016-09-07 19:33:56, "phani sri" <phanisri123 at gmail.com> wrote:

Hello Stefan Snader,

I am PhaniSri and even I am also new to FLASH, you said you are trying to simulate Laser Slab, while compiling the Laser Slab problem with the +hdf5typeio in the setup line, I got an error while executing the flash4, where it is showing an error that "./flash4: undefined symbol:H5Pset_fapl_mpio", do you have any idea regarding this.



Hello all,

I'm relatively new in using the FLASH code and am trying to set up a
simulation comparable to the Laser Slab example.
However, when changing the material properties, the different regions
start to rarefy at their respective borders. This is probably due to the
high pressure difference between the thin gas (vacuum) and the target
region.

Does anybody has experience on modifying the initial conditions such
that the pressure is better matched. Alternatively, is it possible to
toggle material mixing or general hydro processes with a temperature
switch, i.e. defining a lower limit for which the material is kept at
initial conditions?

Thank you!

Steffen Sander


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Message: 2
Date: Tue, 6 Sep 2016 08:42:25 -0500
From: Anshu Dubey <dubey at flash.uchicago.edu>
Subject: Re: [FLASH-USERS] Two issues (PLUTO and Chombo)
To: David Melon Fuksman <dmelonf at gmail.com>
Cc: flash <flash-users at flash.uchicago.edu>
Message-ID:
        <CAJGMwUFFBM6nf-2AHHtFvWv55SO+amwdySzizPx5SnX2NaTLwA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

The module in FLASH was contributed by Andrea Mignone, the author of Pluto.
The module is FLASH is several years old, and it is very likely that Andrea
has been updating the implementation in Pluto. That is why it would be
better to use Pluto. Also, FLASH+Chombo has limited capability, many of
FLASH modules do not interoperate with Chombo, whereas Pluto uses Chombo
for AMR. So overall Pluto seems like a better option for you.
Best,
Anshu

On Mon, Sep 5, 2016 at 8:33 AM, David Melon Fuksman <dmelonf at gmail.com>
wrote:

> Dear all,
>
> I am beginning to use FLASH to do RHD simulations for my PhD in physics. I
> would like to bring two questions regarding different subjects.
>
> The first one is a little strange, about a file called Config in the
> directory FLASH4.3/source/physics/Hydro/HydroMain/split/RHD. At the 3rd
> line, it says "*# DWL: PLUTO would be  a better choice for doing
> Relativistic Hydro than FLASH.*" Does anyone know the source of that
> line? In any case, if that is so, I would be interested in knowing the
> reasons for such a claim!
>
> The second one is regarding the use of FLASH+Chombo. Has anyone tried
> using Chombo and would like to tell me how did it go? Because I am having
> some troubles compiling its libraries, and I think it is due to a problem
> in the paths indicated in the makefiles that I'm not being able to fix. I
> apologize for bringing this issue here, but I am getting no answer from the
> Chombo developers, and maybe someone in this list had similar problems.
>
> Thank you very much for your attention,
>
> David Melon Fuksman
> Sapienza Universit? di Roma
>



--
********************************************************
Anshu Dubey
630 252 3313 (work)
312 420 0033 (mobile)
Argonne National Laboratory
********************************************************
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--

D. P. S. L. Kameswari,
Ph. D(Physics)
ACRHEM
University Of Hyderabad,
Hyderabad,
e-mail:phanisri123 at gmail.com
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