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Extraction at Arbitrary Points and NaN
Posted 15 juin 2016, 03:17 UTC−4 Fluid & Heat, Interfacing, Computational Fluid Dynamics (CFD) Version 5.1 2 Replies
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I have gone through the matlab-comsol livelink manual, and I understand that the NaN output value occurs when the extraction point is outside of the computation domain; but in this case the point is within the domain and I am still getting the NaN value. Please, I will appreciate any assistance or suggestions.
Kindly find as attached the files in case you have sufficient time to run and check.
Regards
FEMI
Kindly find as attached the files in case you have sufficient time to run and check.
Regards
FEMI
Attachments:
2 Replies Last Post 16 juin 2016, 15:21 UTC−4
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Posted:
8 years ago
Hi
Your mesh looks too coarse to get any reliable result for your flow problem. Hence it could very well be the case that the variables you are trying to evaluate are in fact NaN.
--
Lars Gregersen
Comsol Denmark
Your mesh looks too coarse to get any reliable result for your flow problem. Hence it could very well be the case that the variables you are trying to evaluate are in fact NaN.
--
Lars Gregersen
Comsol Denmark
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Posted:
8 years ago
Thanks Lars. I was able to extract when i put the coordinates directly in the mphinterp command line, even with the coarse mesh (i used the coarse mesh just to hasten the computation, but I am currently running with finer mesh now), that is:
coord28a=[5.4569;-12.0259];
mphinterp(model,'p','coord',coord28a,'dataset','dset2','t',20);
but when i used the same coordinates in formular form i get NaN. Please, if you will be able to look at the attached MATLAB code line 233 to 268. This is the main code.
coord28a=[5.4569;-12.0259];
mphinterp(model,'p','coord',coord28a,'dataset','dset2','t',20);
but when i used the same coordinates in formular form i get NaN. Please, if you will be able to look at the attached MATLAB code line 233 to 268. This is the main code.
Attachments: