numerical radius of curvature

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Guest

Posted: Wed Mar 07, 2007 9:24 am

Hi all

I have a 2-d vector field defined by an opaque function,
f(x,y) give me the vector at (x,y). That is my total information
on the field (no derivatives etc).

I would like to find the radius of curvature of the streamlines
of the field through (x,y). I suppose one could use a Runge-Kutta
method to obtain a local estimate of the streamline through (x,y),
and then fit a circle to that.

Is there a better way?

Thanks!

-j

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