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calculate the radius of curvature in 2D model
Posted Dec 21, 2012, 7:33 a.m. EST 1 Reply
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Dear colleaugues,
I was looking for ways of calculating the radius of curvature of a deforming boundary in 2D model (in time dependent solid mechanics module).
i tried to use the equations derived for two fucntions of time i.e. u = u(t) and v=v(t) ,
Rad of curv = ((ut^2+vt^2)^1.5 )/(ut*vtt +vt*utt)
but this equation give me very noisy values which are bad for my solver. do u have any other suggestion to deal with this kind of problem?
Thanking you in advance
I was looking for ways of calculating the radius of curvature of a deforming boundary in 2D model (in time dependent solid mechanics module).
i tried to use the equations derived for two fucntions of time i.e. u = u(t) and v=v(t) ,
Rad of curv = ((ut^2+vt^2)^1.5 )/(ut*vtt +vt*utt)
but this equation give me very noisy values which are bad for my solver. do u have any other suggestion to deal with this kind of problem?
Thanking you in advance
1 Reply Last Post Dec 21, 2012, 9:56 a.m. EST
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Posted:
1 decade ago
Hi
the noise comes from your higher order derivatives, try increasing the discretization order by "1", and use fine time steps.
Anyhow this has been discussed a few times on the Forum the last 2-3 years, so if you search you should find back the explanations on how to ;), I do not remember like that
--
Good luck
Ivar
the noise comes from your higher order derivatives, try increasing the discretization order by "1", and use fine time steps.
Anyhow this has been discussed a few times on the Forum the last 2-3 years, so if you search you should find back the explanations on how to ;), I do not remember like that
--
Good luck
Ivar