Addendum: Wolfgang Kapferer actually wrote the second
conversion I talked about, with only a little bit of help from me.
Jeeseon, if you get stuck, I happy to help out with the
converters, especially on the COSMICS side. Wolfgang has
already pointed you in the right direction on the GADGET-2
side. It is not hard, but the devil is in the details ...
Still hope this helps,
Eelco
Eelco van Kampen wrote:
> Just to help out Volker, who is busy enough anyway, I could
> perhaps answer this question:
> Bertschingers's COSMICS initial conditions are to my knowledge
> not compatible with GADGET-2 without doing some work.
> I used to use the Barnes & Hut treecode, for which I needed to
> convert COSMICS initial conditions to those suitable for my
> (cosmological) version of the Barnes & Hut code. These initial
> conditions cannot be read be GADGET-2, so when I switched to
> GADGET-2 I simple wrote another conversion programme. A bit
> inefficient, converting twice, so in your case you might want to
> do a direct conversion. But some work needs to be done by you.
> This is actually a useful exercise, although tedious !
>
> Hope this help,
> Eelco van Kampen (recently 'converted' to GADGET-2 !)
>
>
> jsong4_at_astro.uiuc.edu wrote:
>
>>Hi.
>>
>>I am doing galaxy cluster simulation using Gadget2. I have compiled
>>Gadget2, but when i try to run it, it complains.
>>
>>Compared to an equivalent serial code, there is some unnecessary overhead.
>>
>>This is Gadget, version `2.0'.
>>
>>Running on 1 processors.
>>
>>Allocated 30 MByte communication buffer per processor.
>>
>>Communication buffer has room for 714938 particles in gravity computation
>>Communication buffer has room for 245760 particles in density computation
>>Communication buffer has room for 196608 particles in hydro computation
>>Communication buffer has room for 182890 particles in domain decomposition
>>
>>
>>Hubble (internal units) = 100
>>G (internal units) = 43.0071
>>UnitMass_in_g = 1.989e+43 UnitTime_in_s = 3.08568e+19
>>UnitVelocity_in_cm_per_s = 100000 UnitDensity_in_cgs = 6.76991e-31
>>UnitEnergy_in_cgs = 1.989e+53
>>
>>Task=0 FFT-Slabs=32
>>incorrect header format
>>task 0: endrun called with an error level of 890
>>
>>
>>ERROR: 0031-250 task 0: Terminated
>>
>>-----------
>>
>>This is the error message that I get. I guess the header format is
>>incorrect whihc I generate (the initial conditions) with COSMICS which
>>is written in F77. So I guess my initial condition is incorrect? In
>>the user guide, it is said several flags were not used for public
>>version of Gadget 2. Does it mean that I should just put zeros for those
>>flags or should I omit the spaces themselves, so that the size of the
>>unused array in the header becomes (256-everhthing that I actually have
>>values for)/4 for integer unused?
>>
>>Have any idea where I should start fixing the problem?
>>
>>THanks much
>>
>>Jeeseon song
>>
>>
>>
>>
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>
>
>
>
>
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Received on 2006-05-09 09:53:33