File:VFPt flat cylinder magnet.svg

Summary

Description
English: Drawing of a homogeneously magnetized flat cylindrical magnet with exactly computed magnetic field lines. The cylinder has the proportions R/L=2. The magnetic north pole is aligned on top and the magnetic south pole on the bottom, with magnetization along the cylinder axis.
Date
Source Own work
Author Geek3
Other versions potential
SVG development
InfoField
 
The SVG code is valid.
 
This plot was created with VectorFieldPlot.
Category:Valid SVG created with VectorFieldPlot code#VFPt%20flat%20cylinder%20magnet.svg
 
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Quality image

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Source code
InfoField

Python code

# paste this code at the end of VectorFieldPlot 1.10
# https://commons.wikimedia.org/wiki/User:Geek3/VectorFieldPlot
doc = FieldplotDocument('VFPt_flat_cylinder_magnet', commons=True,
    width=800, height=800)
field = Field({'coils':[[0, 0, pi/2, 2, 0.5 ,1]]})

doc.draw_magnets(field)

# distribute field lines proportionally to the field strength at y=0
x0 = 2.
Fsum = ig.quad(lambda x: field.F([x, 0.])[1], -x0, x0)[0]
nlines = 22
xstart = [op.brentq(lambda xs: ig.quad(lambda x: field.F([x, 0.])[1],
    -x0, xs)[0] / Fsum - (0.5+i)/nlines, -x0, x0) for i in range(nlines)]

for i, x in enumerate(xstart):
    line = FieldLine(field, [x, 0.], directions='both', maxr=12)
    doc.draw_line(line, arrows_style={'dist':2.5, 'scale':1.3})

doc.write()

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
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  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Category:CC-BY-SA-4.0#VFPt%20flat%20cylinder%20magnet.svg
Category:Self-published work Category:Field lines around magnets (image set) Category:Field lines around magnets Category:Photos by User:Geek3 Category:Bar magnets Category:Dipole magnet
Category:Bar magnets Category:CC-BY-SA-4.0 Category:Dipole magnet Category:Field lines around magnets Category:Field lines around magnets (image set) Category:Photos by User:Geek3 Category:Quality images - valid vector Category:Self-published work Category:Valid SVG created with VectorFieldPlot code