RES: [Paraview] Probing a solution position over time

Wed Jan 18 10:26:27 EST 2006

I'm using an interface capturing method where I use a fixed unstructured
grid (with tetrahedra) and the interface is captured with the transport of a
marking function with the advection equation coupled with a Navier-Stokes
solver (the principle of VOF and level set methods). Thus, I have velocity,
pressure and the "scalar marker" as solution.

-----Mensagem original-----
De: Berk Geveci [mailto:berk.geveci at gmail.com] 
Enviada em: quarta-feira, 18 de janeiro de 2006 13:12
Para: Renato N. Elias
Cc: paraview at paraview.org
Assunto: Re: [Paraview] Probing a solution position over time

Is your grid fixed or does it move with time? More specifically, are there
points that are attached to the interface? Also, is there a computational
domain where the interface stays stationary?

On 1/18/06, Renato N. Elias <rnelias at nacad.ufrj.br> wrote:
>
> Hmmm... Ok
>
> - A point over time will produce a 2D plot with the solution evolution 
> over time (I did it).
>
> - A line over time should produce a 3D plot with the solution 
> distribution X line distance X time (and PV can't render a 3D plot yet,
ok).
>
> Here is the my problem: With a punctual probing PV will give me the 
> value animation at that specific point in the space. I was thinking 
> about specifying a scalar value and get the position variation 
> (coordinates over Z
> axis) of this scalar value over time.
>
> Let me try to make me more clear. I'm doing a free surface simulation 
> and I would like to track the interface between 2 fluids. The 
> interface is a scalar value defined by 0.5. Thus, I need "to glue" a 
> point at the interface (defined by the value 0.5) and see this point 
> position oscillating over time OR put a line (as it was a scale) in my 
> model and see the value position over the time
>
>
> -----Mensagem original-----
> De: Berk Geveci [mailto:berk.geveci at gmail.com] Enviada em: 
> quarta-feira, 18 de janeiro de 2006 12:26
> Para: Renato N. Elias
> Cc: paraview at paraview.org
> Assunto: Re: [Paraview] Probing a solution position over time
>
> I don't think probing with a line over time works. This is the case 
> because the built-in plot is 1D and cannot do carpet plots. If you 
> animate that, it will generate the plot for the current time only. I 
> think you can only probe with a point over time.
>
> On 1/18/06, Renato N. Elias <rnelias at nacad.ufrj.br> wrote:
> >
> > Hi Berk,
> >
> > I've already tried this but I was not able to understand what PV 
> > returned me as CVS file. I did the following steps:
> >
> > 1. probe;
> > 2. put the line as probe object at the desired position to track the 
> > solution fluctuation; 3. turned on the XY plot (100 resolution 
> > points); 4. Selected the desired variable; 5. Played animation (PV 
> > updated the XY plot correctly); 6. Exported the CVS file.
> >
> > My problem was that with 381 time steps Paraview produced only 101 
> > probing points and a sequence of zeroes (see below). I was expecting 
> > 100
> > (resolution) x 381 (time step) points. What's wrong, me or Paraview
> > ;-)
> >
> > CVS file:
> > -----------------------------------------------------
> > scalar,0.999169,0.796975,0.664442,0.301977,0.0303496,0.0670275,0.121
> > 22
> > 4,0.11
> > 5764,0.107367,0.109633,0.111905,0.111316,0.109866,0.11061,0.110975,0
> > .1
> > 12038,
> > 0.111914,0.113595,0.11368,0.116214,0.116025,0.118887,0.117329,0.1220
> > 99
> > ,0.121
> > 183,0.124607,0.121372,0.125367,0.126541,0.124592,0.126016,0.125052,0
> > .1
> > 19828,
> > 0.12701,0.1202,0.126363,0.124791,0.124554,0.120287,0.122152,0.118757
> > ,0
> > .11998
> >
>
2,0.119189,0.120276,0.121142,0.121215,0.120831,0.120417,0.118901,0.117745,0.
> > 115605,0.112607,0.109625,0.106367,0.103832,0.103236,0.102936,0.10293
> > 1,
> > 0.1011
> > 31,0.102156,0.100699,0.0988598,0.0961065,0.0928396,0.0898587,0.08753
> > 48
> > ,0.085
> > 9372,0.0847991,0.0842267,0.0847019,0.0856358,0.0874848,0.088467,0.08
> > 66
> > 29,0.0
> > 82856,0.0752954,0.0684321,0.0622399,0.0584943,0.0565929,0.0558061,0.
> > 05
> > 55034,
> > 0.05554,0.0555439,0.0556105,0.0555859,0.0555413,0.0553122,0.0550449,0.
> > 054968
> > 1,0.0545769,0.0546121,0.0536979,0.053699,0.0519272,0.0519754,0.04952
> > 8,
> > 0.0498
> > 746,0.0472949,0.0477846,0.0450583
> > X or
> > T,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
> > 0,
> > 0,0,0,
> > 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
> > 0, 0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
> > -----------------------------------------------------
> >
> > Regards
> >
> > Renato N. Elias
> > ===============================================
> > PhD student - http://www.nacad.ufrj.br/~rnelias High Performance 
> > Computing Center Federal University of Rio de Janeiro Rio de 
> > Janeiro, Brazil
> > +55(21) 2562-8080
> >
> > -----Mensagem original-----
> > De: Berk Geveci [mailto:berk.geveci at gmail.com] Enviada em:
> > quarta-feira, 18 de janeiro de 2006 12:05
> > Para: Renato N. Elias
> > Cc: paraview at paraview.org
> > Assunto: Re: [Paraview] Probing a solution position over time
> >
> > Actually, it is possible :-) Here is how you do it:
> >
> > probe
> > turn on xy plot
> > setup an animation in time (this happens automatically with some
> > readers) play you can also export the curve with export cvs
> >
> > On 1/18/06, Renato N. Elias <rnelias at nacad.ufrj.br> wrote:
> > >
> > > Hello all,
> > >
> > > I think it's not possible to do what I want with Paraview yet, but 
> > > even so, here goes my question:
> > >
> > > How could I probe a solution position over time with Paraview? I 
> > > mean, I would like to anchor a point in a specific solution value 
> > > and extract the position fluctuation over time.
> > >
> > > Thanks for any help...
> > >
> > > Renato N. Elias
> > > ===============================================
> > > PhD student - http://www.nacad.ufrj.br/~rnelias High Performance 
> > > Computing Center Federal University of Rio de Janeiro Rio de 
> > > Janeiro, Brazil
> > > +55(21) 2562-8080
> > >
> > >
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