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Re: [ESPResSo-users] LB + vtk file format


From: Georg Rempfer
Subject: Re: [ESPResSo-users] LB + vtk file format
Date: Wed, 28 Aug 2013 12:08:21 +0200

I think we put up all of those and more here:

http://www.icp.uni-stuttgart.de/~icp/html/videos/

2013/8/28 pdam bright <address@hidden>:
> Dear Ulf,
> Thanks for your immediate answer.
>
> I used stream Tracer to produce streamlines from my files. Am I right?
> I haven't think to this ratio (temperature/Peclet number of the system) yet,
> I should calculate it to see how big is the fluctuation. Good advice!
>
> --------------------------------------------------
>
> Dear George,
>
> Thanks for your answer and the movies. Unfortunately, although I tried a lot
> I could see only the first movie. In my try for the last 3# ones, It said
> that it is currently unavailable! Is there any other link for these? I
> really like to watch them.
>
> As you mention, Maybe everything drowns in fluctuations. I should check for
> the magnitude of fluctuations.
> If it doesn't work, I will come back
>
> ----------------------------------------------------
>
> Bests,
> Pet
>
>
>
>
>
>
>
> On Tue, Aug 27, 2013 at 4:38 PM, Ulf Schiller <address@hidden>
> wrote:
>>
>> On 08/27/2013 01:47 PM, pdam bright wrote:
>>>
>>> Deat all,
>>>
>>> I am new to simulating a system with LB feature.
>>> As the output of a simple code (one particle in solvent), I produce 200
>>> vtk files by using this command
>>> */lbfluid print vtk velocity filename/*
>>>
>>>
>>> Using paraview to have an animation of these vtk files, I expect to have
>>> a smooth movie of solvent streamlines. But I only see 200 completely
>>> independent frames! For example I expect that at first frame I have no
>>> streamlines and passing time the streamlines grow. But the streamlines
>>> are present from the initial frame and I see no growth in them.
>>>
>>> What is false? My expectation that these files are to produce
>>> streamlines or my runs?
>>
>>
>> Hi Pet,
>>
>> It's really hard to tell without knowing any parameters etc.
>>
>> What filter are you using in paraview to determine the streamlines from
>> the vector field?
>>
>> What is the temperature/Peclet number of the system? Due to fluctuations
>> you may need to average the flow field to 'see' something beyond noise.
>>
>> Best wishes,
>> Ulf
>>
>> --
>> Dr. Ulf D. Schiller                        Building 04.16, Room 3006
>> Institute of Complex Systems (ICS-2)       Phone:   +49 2461 61-6144
>> Forschungszentrum J├╝lich, Germany          Fax:     +49 2461 61-3180
>>
>



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