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Parabolic geometry?

Posted Jun 9, 2011, 6:56 a.m. EDT Geometry Version 4.0a 3 Replies

Ulrich Schröder
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Hello,

I am trying to create the parabolic geometry y = sqrt(x^2+C) to define an electrode array. How can I do this just making use of COMSOL (at the moment I do not have access to CAD or MATLAB)?
I know how to define a function in "global definitions", but I do not know how to put this into the geometry submenu.

Thank you very much!
3 Replies Last Post Jun 9, 2011, 9:32 a.m. EDT
Jeff Hiller COMSOL Employee

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Posted: 1 decade ago Jun 9, 2011, 8:32 a.m. EDT
In 2D, you can use Parametric Curve. That feature was introduced at v4.1.
In 3D, to generate a paraboloid you could use Parametric Surface (feature introduced at 4.2) or, alternatively, you could start in a workplane, use a Parametric Curve and then revolve that curve 360 degrees.
In 2D, you can use Parametric Curve. That feature was introduced at v4.1. In 3D, to generate a paraboloid you could use Parametric Surface (feature introduced at 4.2) or, alternatively, you could start in a workplane, use a Parametric Curve and then revolve that curve 360 degrees.
Ulrich Schröder
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Posted: 1 decade ago Jun 9, 2011, 8:47 a.m. EDT

Thanks, unfortunately I am using Vers. 4.0a; is there any way to perform it?
Thanks, unfortunately I am using Vers. 4.0a; is there any way to perform it?
Jeff Hiller COMSOL Employee

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Posted: 1 decade ago Jun 9, 2011, 9:32 a.m. EDT
Upgrade to v4.2 :)
Seriously, it's superior to v4.0a in many ways, not just the availability of these geometric primitives, so it's really worth keeping up.
Upgrade to v4.2 :) Seriously, it's superior to v4.0a in many ways, not just the availability of these geometric primitives, so it's really worth keeping up.

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