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Arc lengths

Posted Jun 14, 2021, 6:03 a.m. EDT Simulation Apps 1 Reply

Kieran Holmes-Martin
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Hi,

I am fairly new to COMSOL and I am trying to create a design in COMSOL model builder.

I am in the 2D model builder and I am trying to create an arc length of 40mm, but alter the radius of it.

Can anyone point me in the right direction?

Thanks

1 Reply Last Post Jun 14, 2021, 9:13 a.m. EDT
Mark Harradine
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Posted: 3 years ago Jun 14, 2021, 9:13 a.m. EDT
Updated: 3 years ago Jun 14, 2021, 9:13 a.m. EDT

create 3 global parameters:

Angle equal to 360 x ArcLength/(2 x pi x r)

ArcLength equal to 40[mm]

r equal to 30[mm] (for starters)

Create an circular arc in the Geometry node by specifying centre, radius and angles

have centre at 0,0

radius set to r

start and end angles set to -Angle/2 to Angle/2

job done!

create 3 global parameters: Angle equal to 360 x ArcLength/(2 x pi x r) ArcLength equal to 40[mm] r equal to 30[mm] (for starters) Create an circular arc in the Geometry node by specifying centre, radius and angles have centre at 0,0 radius set to r start and end angles set to -Angle/2 to Angle/2 job done!

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