Hey Cory,
Thank you for your email. Can I get some hints about how can I multiply each
cell volume with the water fraction.
Regards,Islem MegdichePhD student
Le Mercredi 16 mars 2016 12h38, Cory Quammen <[email protected]> a
écrit :
Islem,
Thanks for reporting back which worked. I'm not sure why the expression without
the "algs." doesn't work - in any case, I'm glad it is working for you now.
The "inputs[0]" simply means the first element in the inputs list. The index
lets you pick the input (there can be more than one). You could also simply use
"input", which gives you the same element as "inputs[0]".
Cory
On Tue, Mar 15, 2016 at 7:01 AM, Megdich Islem <[email protected]> wrote:
Hi Cory,
Thank you for your email. I tried that example sphere source -> Delaunay3D ->
Python Annotation filter and it works fine. I set the python expression to
algs.sum(algs.volume(inputs[0])) and then to sum(volume(inputs[0])) and it
works in both cases. The type from the information panel is Table.
But, it turns out that for my case the problem is with the Python expression,
when I use this expression algs.sum(algs.volume(inputs[0])) I get errors while
this expression sum(volume(inputs[0])) solves the problem. The type from the
information panel is Table.
Can I ask what does inputs[0] mean in the python expression. I have no
background in python, that's why the expression seems odd to me.
Regards,Islem Megdiche
Le Lundi 14 mars 2016 15h04, Cory Quammen <[email protected]> a
écrit :
One more thing: you should be able to change the Python expression to
sum(volume(inputs[0]))
On Mon, Mar 14, 2016 at 10:09 AM, Cory Quammen <[email protected]> wrote:
Hi Islem,
Sorry for the late reply. I've been swamped lately.
Thank you for the detailed explanation of what you are doing. That really helps
us narrow down what might be going on.
I'm not sure what the problem is. I have a simple pipeline example where this
works:
Sphere source -> Delaunay3D -> Python Annotation filter
The Delaunay3D filter produces an unstructured grid, from which I am able to
get the volumes.
I suspect ParaView readds your OpenFOAM data set as a multiblock data set?
Could you look at the Info panel and report it's Type. It should be the first
item under the "Statistics" sub-section.
If it is indeed a multiblock data set, please try this:
Place a MergeBlocks filter between your Threshold filter and Python Annotation
filter.
Please see if that works. If it does, we'll move on to multiplying the volume
by the water fraction.
Thanks,Cory
On Tue, Mar 8, 2016 at 6:35 AM, Megdich Islem <[email protected]> wrote:
Hi cory, I was working on the case of water computationin the desired domain
taking into account your suggestions. I attached heresome pictures that helps
to figure out how I did it. I created the domain inwhich I want to compute the
volume of water using the clip filter and then Ithresolded the clipped domain
to contain only the cells ranging between0.5 and 1 of alpha water and I ended
up with the domain illustrated in picture3, and then I applied the annotation
filter setting up the array association toPoint Data and the expression to
algs.sum(algs.volume(inputs[0])), but I endedup with an error in the render
view and output message stating thatAttributeError:'None Type' object has no
attribute 'GetCellData'. I couldn'tunderstand the reason, I tried all the
array Association options, I gotthe same error, except for the Row Data, I got
this error:AttributeError:'NoneType' object has no attribute
'GetNumberOfArrays'.(picture 4 and 5). I googled that link
paraview.simple.PythonAnnotation — ParaView/Python5.0.1-RC1-193-gad11756
documentation
| |
| | | | | | |
| paraview.simple.PythonAnnotation — ParaView/Python 5.0.1-RC1-193-gad11756
documentation Docs » Index paraview.simple.PythonAnnotation
paraview.simple.PythonAnnotation paraview.simple.PythonAnnotation(*input,
**params) This filter uses Python to calculate an expression. It | |
| | |
| Afficher sur www.paraview.org | Aperçu par Yahoo | |
| | |
| |
| | | | | | | |
It says that I need to set the input whichI didn't know how to do it since it
doesn't ask for any input in the PropertiesPanel. Any solutions for this
problem ?? In this expression algs.sum(algs.volume(inputs[0])), whatdoes the 0
stands for ? I think if I threshold the domain in which Iwant to calculate
the volume of water, let's say between 0.5 and 1, then I willend up by
inaccurate water volume because I am including volume of air in thecomputed
volume and on the other hand I am ignoring the cells that contain lessthan 0.5
of water. That's why, I am looking for an algorithm that multiplyevery cell
containing water by the coefficient alpha water. You find attachedin picture 6,
an example of how I want to calculate the water volume. I don'tknow how to
program it. Any helps concerning this matter will be verymuch
appreciated.Regards,Islem MegdichePhD student
Le Mardi 23 février 2016 14h21, Cory Quammen <[email protected]> a
écrit :
Hi Islem,
Please reply-all to keep the discussion on the list so that others may
benefit from the discussion.
First, is there a data array that describes whether a volume element
in your mesh contains water or some other element? If so, you can use
the Threshold filter under the Filters -> Alphabetical -> Threshold
menu to select only the elements representing water. You will have to
set the minimum and maximum to the value that represents water, then
click Apply.
HTH,
Cory
On Mon, Feb 22, 2016 at 1:14 PM, Megdich Islem <[email protected]> wrote:
> Hi again,
>
> Thank you for your suggestion, Could you please explain how to do the first
> step because I am not the one who created the picture I sent you before.
>
> Regards,
> Islem
>
>
> Le Lundi 22 février 2016 16h45, Megdich Islem <[email protected]> a
> écrit :
>
>
> Thank you for your reply. I will try your suggestions.
>
> Regards,
> Islem
>
>
> Le Lundi 22 février 2016 14h22, Cory Quammen <[email protected]> a
> écrit :
>
>
> Islem,
>
> There are likely two steps:
>
> 1). Threshold your volume to identify only the water-containing cells.
> It looks like you have a way to do this already?
>
> 2). Compute the volumes of the water-containing cells and summing them up.
>
> You can use the Threshold filter to do number 1 if you have a material
> code in the cell data. To compute the volume of the cells, add a
> Python Annotation filter to the Threshold filter. Set the Expression
> to
>
> algs.sum(algs.volume(inputs[0]))
>
> This uses the numpy-like interface in the Python layer to compute the
> volumes of the cells and sum them all up. The Python Annotation filter
> should display the volume with a text label in your renderer.
>
> Hope this helps,
> Cory
>
> On Mon, Feb 22, 2016 at 9:09 AM, Megdich Islem <[email protected]>
> wrote:
>> Hi Cory,
>>
>> Thank you very much for your prompt reply. I've attached here a picture
>> that
>> illustrates my problem. I am working on the break of bund walls and I want
>> to compute the volume of water that overtops the bund wall (walls
>> surrounding storage tank), after the solution reaches the steady state.
>>
>> Regards,
>> Islem
>>
>>
>> Le Lundi 22 février 2016 13h53, Cory Quammen <[email protected]> a
>> écrit :
>>
>>
>> Hi Islem,
>>
>> This is the place to ask ParaView questions! There is some activity on
>> StackOverflow, but most people ask questions on this mailing list.
>>
>> Could you clarify what you want to compute? Do you just want to subset
>> a volume mesh and display the results over time? Do you want to
>> compute one quantity and display it as a graph over time? Do you want
>> to compute a single number from a time series data set?
>>
>> Thanks,
>> Cory
>>
>> On Mon, Feb 22, 2016 at 8:48 AM, Megdich Islem <[email protected]>
>> wrote:
>>> Hello,
>>>
>>> I am new to paraview, and I didn't find a forum under paraview website to
>>> ask my question.
>>> My question is is there any filter in paraview that lets to compute the
>>> evolution of a quantity within a specific volume of the mesh.
>>>
>>> Regards,
>>> Islem
>>>
>>> _______________________________________________
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>>
>>>
>>
>>
>>
>> --
>> Cory Quammen
>> R&D Engineer
>> Kitware, Inc.
>
>>
>>
>>
>
>
>
> --
> Cory Quammen
> R&D Engineer
> Kitware, Inc.
>
>
>
>
--
Cory Quammen
R&D Engineer
Kitware, Inc.
--
Cory Quammen
R&D Engineer
Kitware, Inc.
--
Cory Quammen
R&D Engineer
Kitware, Inc.
--
Cory Quammen
R&D Engineer
Kitware, Inc.
_______________________________________________
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