Dear Bernd,
thank you very much for your help. I think I need a new phase diagram for this situation. Perhaps I need to try a TC coupling method. I'll discuss it with my supervisor. Hope I can figure it out at the end.
Thank you!
Best regards,
Liyc
setting of separated simulation
Re: setting of separated simulation
Hi
In the case of growth under faceted anisotropy with just one facet say
# Number of possible orientations of a facet 1
1
# 1 -th normal vector facet 1 ? 3*
1
0
0
growth in directions of 0 or 90 degrees have very high aspect ratio but growth in 45 degrees have lower aspect ratio (similar to circle). I believe it is because of the grid anisotropy in the solution of the phase field.
In the case of growth under faceted anisotropy with just one facet say
# Number of possible orientations of a facet 1
1
# 1 -th normal vector facet 1 ? 3*
1
0
0
growth in directions of 0 or 90 degrees have very high aspect ratio but growth in 45 degrees have lower aspect ratio (similar to circle). I believe it is because of the grid anisotropy in the solution of the phase field.
Re: setting of separated simulation
Hi mtoloui,
This is easily possible, though hard to say without more details. If so, it the artifact should vanish with higher grisd resolution!
But which is the connection to the actual thread?
Bernd
This is easily possible, though hard to say without more details. If so, it the artifact should vanish with higher grisd resolution!
But which is the connection to the actual thread?
Bernd
Re: setting of separated simulation
Hi Bernd,
I unfortunately did not get your point. Even very fine mesh size does not help much.
Best regards
I unfortunately did not get your point. Even very fine mesh size does not help much.
Best regards
Re: setting of separated simulation
Hi mtoloui,
if the results do not depend on the grid resolution or on the interface thickness, it cannot be a grid effect
...
Try to increase the interface thickess. In case of a low interface thicknes, a facet which is not parallel to the grid may exhibit more noise on the gradient vector, and thus may not behave like a facet.
The problem could also depend on kappa: If the facet is defined to be too sharp (in function of the orientation angle), in an oblique interface most interface grid cells may lie "outside" and not behave like a facet.
Maybe, you should upload an image to show the problem with the different aspect ratios!
Bernd
if the results do not depend on the grid resolution or on the interface thickness, it cannot be a grid effect
...Try to increase the interface thickess. In case of a low interface thicknes, a facet which is not parallel to the grid may exhibit more noise on the gradient vector, and thus may not behave like a facet.
The problem could also depend on kappa: If the facet is defined to be too sharp (in function of the orientation angle), in an oblique interface most interface grid cells may lie "outside" and not behave like a facet.
Maybe, you should upload an image to show the problem with the different aspect ratios!
Bernd