Re: H,B Vector Plots

["alesteakira" <aleste2@xxxxxxxxxxxxx>]

I agree with you that plotting arrows at each cell will be too coarse 
but you may limit to some "density" of arrows.
The arrows may not be very usefull for serious aplications, but they 
may help a lot for my students (i am teaching electromagnetism). Now 
I am using Quickfield for them (because the vectors of D,E) but FEMM 
for the research, and I do really prefer FEMM.



--- In femm@xxxxxxxxxxxxxxx, David Meeker <dmeeker@xxxx> wrote:
> djsquires@xxxx wrote:
> 
> > I would like to add that perhaps some arrows to show polarity or 
flux
> > flow directions similar to Quickfield would be nice too. 
Otherwise we
> > have to check the sign of the point properties to be sure of 
this. But
> > first you have to click a point on the plot to get some point 
properties
> > displayed.
> >
> > A simple visual cue like arrows would help. Then if you have the 
contour
> > plot displayed you know instantly the flux flow polarities 
anywhere on
> > the plot without having to click a point to get the point property
> > display. This is qualitative information sure, but it is still 
valuable
> > for double checking coil current polarity reversal mistakes and 
such.
> >
> > This can be an option that can be turned on or off or set as a 
default
> > just like all the other display formats.
> >
> > Regards,
> > Dave Squires
> >
> > alesteakira wrote:
> > > Is it possible to plot the vectors of H,B in FEMM
> > > viewer? If not, do you think of including it in
> > > future releases.?
> >
> I'd never included the vector plots (i.e. arrows indicating the 
strength 
> and direction of flux density plotted at each grid points) simply 
> because I've never found them to be that useful to me. It has 
always 
> seemed to me that the density of such plots is too coarse to convey 
that 
> much useful information. I could include them in a future release 
if 
> there is generally a strong desire for this functionality. 
> 
> Alternatively, it might be useful just to superimpose arrow heads 
on the 
> flux lines as they are currently plotted. The arrow heads indicate 
> direction, and the density of the lines would indicate field 
strength 
> (well, at least for 2D planar problems).
> 
> Dave.
> -- 
> David Meeker
> email: dmeeker@xxxx
> www: http://femm.berlios.de/dmeeker