[OpenFOAM] Display center of mass with mesh

13msmemusman · May 3, 2015, 13:04

Thank you sir it has already been successful. Thanks a lot for this kind help.
Sincerely
Usman

Hale_812 · June 12, 2018, 21:43

Quote:

Originally Posted by wyldckat

...The following took me some considerable time to program. Steps to use:
In ParaView (I tested this in ParaView 4.1.0), select from the menu "Sources" the "Programmable Source".

It now shows at least 3 options, which should be populated as follows:

Output Data Set Type: vtkPolyData

Script:

My test file "test.csv" contains this:

Dear wyldckat.

I have similar goal of loading datalogger-style time-voltage readings .csv table as time-varying data source.

Surprisingly, ParaView still does not have this fundamental featureж I mean, interpreting time data. Upon searching with Google, I found your post from 2015.

Unfortunately, I am not a programmer, and have little Idea about Paraview Python API, so I can not make your script working on my system.
And my system is ParavView 5.5.0 x64 for Win64, official build.

First, using manuals, I tried tweaking it for time-voltage 2-column data file. But I could create just 2 timesteps, "0" and "1", with wrong values not present in the table.
Then I just tried executing your example with your test-file without change. And got this error message:

Traceback (most recent call last): File "<string>", line 19, in <module>
File "<string>", line 44, in RequestData
NameError: global name 'arrayX' is not defined

Can you please help solving this problem?

Hale_812 · June 12, 2018, 22:14

Oh, Increadible! I just got an idea why didn't it work with your example.
ParaView 5 can execute Python programmable Source ONLY ONCE! After that, it should be closed and restarted. So weird.

Anyway, I see, your code can load only 2 timesteps "0", and "1" from the whole table.

I tried my table with 770 values from 0 to 7.714910349e-009 s.
And it loaded the final value only. I guess, because it did not find 1s timestep, and obeyed directive "elif arrayT[-1] <= req_time:"

When calling SetOutputTimesteps(self, (0, 7.6147167081e-009)) with 7.6147167081e-009s timestep as an argument, it reads the value for time=0 instead. But the added time is 7.61472e-009.

So, is there a way to import all the timesteps with float-format time data?
And a way of resetting the numpy environment before the script is executed, so I don't have to restart ParaView every time?

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May 3, 2015, 13:04		#21
13msmemusman Member Muhammad Usman Join Date: Feb 2014 Posts: 91 Rep Power: 0	Thank you sir it has already been successful. Thanks a lot for this kind help. Sincerely Usman

June 12, 2018, 22:14		#23
Hale_812 New Member Hale Join Date: Apr 2018 Posts: 7 Rep Power: 8	Oh, Increadible! I just got an idea why didn't it work with your example. ParaView 5 can execute Python programmable Source ONLY ONCE! After that, it should be closed and restarted. So weird. Anyway, I see, your code can load only 2 timesteps "0", and "1" from the whole table. I tried my table with 770 values from 0 to 7.714910349e-009 s. And it loaded the final value only. I guess, because it did not find 1s timestep, and obeyed directive "elif arrayT[-1] <= req_time:" When calling SetOutputTimesteps(self, (0, 7.6147167081e-009)) with 7.6147167081e-009s timestep as an argument, it reads the value for time=0 instead. But the added time is 7.61472e-009. So, is there a way to import all the timesteps with float-format time data? And a way of resetting the numpy environment before the script is executed, so I don't have to restart ParaView every time?