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Discontinuous cut-line
Posted 13 avr. 2015, 12:33 UTC−4 Results & Visualization Version 4.3, Version 5.2 4 Replies
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Hi All
I draw a cut-line to read B-norm along it but the B-norm curve is discontinuous. I checked the cut-line and I observed that the cut-line is also discontinuous. I do not know why this happens, Any body knows the answer?
Thanks
I draw a cut-line to read B-norm along it but the B-norm curve is discontinuous. I checked the cut-line and I observed that the cut-line is also discontinuous. I do not know why this happens, Any body knows the answer?
Thanks
4 Replies Last Post 10 juin 2016, 14:29 UTC−4
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Posted:
10 years ago
Hi every body
I could find the reason. I remove the tick of ''snap to the closet boundary'' in the 2D cut-line setting window. It is now OK but the question is why it should be discontinuous when it snaps to the nearest boundary.
Regards
Hamid
I could find the reason. I remove the tick of ''snap to the closet boundary'' in the 2D cut-line setting window. It is now OK but the question is why it should be discontinuous when it snaps to the nearest boundary.
Regards
Hamid
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Posted:
8 years ago
Hi every body
I could find the reason. I remove the tick of ''snap to the closet boundary'' in the 2D cut-line setting window. It is now OK but the question is why it should be discontinuous when it snaps to the nearest boundary.
Regards
Hamid
If you've found an answer to this please let me know
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Posted:
8 years ago
I do not remember what I did, but if you share your model I can have a look. Try to refine the mesh, maybe it helps.
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Posted:
8 years ago
Hi
If you plot a dependent variable, in a model with second order discretization (mostly the default in many physics with COMSOL) you will get a smooth continuous "line".
But if your discretization is of first order (default for some physics) or simply you are plotting a variable that depends on the first spatial derivative of your dependent variable, then this line will have discontinuities, or will appear stair-wise/staggered. This is a feature of numerical simulations and the way things are set-up here.
Another, different issue one might have with cut lines, or planes, is that if your cut domains are discontinuous you cannot get a plot out with the default Plot settings, then you need to change the "x" scale expression from the default line "s variable" to one of the coordinate variables such as x, y or z or any expression thereof.
--
Good luck
Ivar
If you plot a dependent variable, in a model with second order discretization (mostly the default in many physics with COMSOL) you will get a smooth continuous "line".
But if your discretization is of first order (default for some physics) or simply you are plotting a variable that depends on the first spatial derivative of your dependent variable, then this line will have discontinuities, or will appear stair-wise/staggered. This is a feature of numerical simulations and the way things are set-up here.
Another, different issue one might have with cut lines, or planes, is that if your cut domains are discontinuous you cannot get a plot out with the default Plot settings, then you need to change the "x" scale expression from the default line "s variable" to one of the coordinate variables such as x, y or z or any expression thereof.
--
Good luck
Ivar