[Paraview] Probing a solution position over time

Wed Jan 18 13:18:38 EST 2006

Hmm. Tricky. Let's say you extracted the surface somehow. How are you
going to lock the position of the point in all directions? Do you want
to lock to a point on the surface and given x & y?

-Berk

On 1/18/06, Renato N. Elias <rnelias at nacad.ufrj.br> wrote:
>
> 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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