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Subject: Re: [PIConGPU-Users] Gas free formula
To: picongpu-users@hzdr.de
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From: Axel Huebl <a.huebl@hzdr.de>
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Date: Sun, 22 Jan 2017 22:50:08 +0100
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Hi Danila,

the cellSize is only in this function for people that want to do
debugging, like filling a selected n-th cell with a density.

Cheers,
Axel

On 18.01.2017 16:42, Khikhlukha Danila wrote:
> Dear all,
> 
> I have a question regarding gas free formula implementation: why cell
> dimensions are used as a parameter for a () operator (see here
> <https://github.com/ComputationalRadiationPhysics/picongpu/blob/master/src/picongpu/include/particles/gasProfiles/FreeFormulaImpl.hpp#L58>).
> 
> The way how I understand the code is that I have to provide T_ParamClass
> implementation with operator () overloaded such that it returns a
> normalized density for a given position vector in real SI units. Then it
> is a bit unclear how cellSize might be helpful here? My only guess would
> be a vacuum slab on the top of the domain, but in T_ParamClass I can
> specify it in SI units as well and compare it to the position directly…
> 
>  
> 
> Best regards,
> 
> Danila.
> 

-- 

Axel Huebl
Phone +49 351 260 3582
https://www.hzdr.de/crp
Computational Radiation Physics
Laser Particle Acceleration Division
Helmholtz-Zentrum Dresden - Rossendorf e.V.

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