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[OpenFOAM] Paraview's "read-values" capability |
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February 23, 2013, 14:40 |
Paraview's "read-values" capability
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#1 |
Member
VS
Join Date: Nov 2012
Posts: 86
Rep Power: 13 |
Hey lads,
i have these values in one of my results files for p : 83333.29727559452 83333.29727116377 83333.29728432324 83333.29726004707 83333.29726903667 83333.29726512189 83333.2972572857 83333.29729613037 83333.29731830103 83333.29732028065 and many more for all the points in the grid. As you can see, the difference starts from the fourth significant digit and there is a difference in the values, but paraview plots only two values, 83333.306514 for max and 83333.290024 for min, and not the intermediate values. It just show two colours, blue for the min and red for the max. Why it doesn't plot the other values??? |
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February 23, 2013, 16:32 |
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#2 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,980
Blog Entries: 45
Rep Power: 128 |
Greetings VSass,
Actually, it's not the 4th significant digit, it's the 9th! ParaView has some issues with precision, which AFAIK is due to hard-coded limits in the source code. If you do need to see the results with more precision, you will have to rescale values. Some possible options:
And have you tried the "spreadsheet view"? http://www.paraview.org/Wiki/ParaVie...readsheet_View - this way you can confirm if ParaView has actually loaded those values you listed! Best regards, Bruno
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February 23, 2013, 19:36 |
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#3 |
Member
VS
Join Date: Nov 2012
Posts: 86
Rep Power: 13 |
Thanks Bruno,
i'm working on setting the reference value for p right now, and see if this works. I've checked the spreadsheet view, values are loaded with exact precision on each point, that's why i was so concerned for the colour mapping. Thanks a lot! |
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February 24, 2013, 13:27 |
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#4 |
Member
VS
Join Date: Nov 2012
Posts: 86
Rep Power: 13 |
Bruno,
i didn't exactly caught your advise of how to subtract the reference value 83333.3. You meant rescaling from the colour map? Anyway,this is the last step before entering to the source code, 'cause nothing else seems capable of solving the matter. |
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February 24, 2013, 15:02 |
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#5 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,980
Blog Entries: 45
Rep Power: 128 |
Hi VSass,
Sorry, I thought you knew. You can use the "Calculator" filter: http://www.paraview.org/Wiki/ParaVie...ide/Calculator Best regards, Bruno
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March 24, 2013, 14:08 |
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#6 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,980
Blog Entries: 45
Rep Power: 128 |
Quick update: there was an answer in the ParaView mailing list: http://markmail.org/message/pwhpq2p6kdsdvayy
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accuracy, colours, paraview, plot, values |
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