How to Draw a 3d Circle

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How to draw a circumvolve on a surface of a cake in 3D geometry view, COMSOL 4.1

Olivia Van

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All I can detect in 3D geometry view are functions to draw 3D objects. Simply I need to draw a circle on a suface of a block in order to ready boundary status on it. Whatever one can assist? Thanks,


Ivar Kjelberg "Retired" but still part time CSEM SA (CH)

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Posted: 1 decade ago Mar 11, 2011, iv:04 p.m. UTC

Hi

set a work plane on the surface, and draw a circle in there, and so brand an embedded "surface"
It worked in v3.5, haven't tried information technology yet in v4

--
Good luck
Ivar

Hi set up a work plane on the surface, and draw a circumvolve in at that place, and so make an embedded "surface" It worked in v3.5, haven't tried it even so in v4 -- Proficient luck Ivar


Magnus Ringh COMSOL Employee

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Posted: one decade ago Mar 11, 2011, 4:sixteen p.yard. UTC

Hi,

In 4.ane, the "embedding" is implicit, so all you need to do is to create a piece of work plane that represents the block surface and so depict the circle on that piece of work plane'southward geometry. Then finalize the geometry (by moving on to the physics settings, for case). The circumvolve then defines a separate surface so that y'all tin can specify another boundary status in that area. See the attached screen shot.

Best regards,
Magnus Ringh, COMSOL

Hi, In 4.1, the "embedding" is implicit, so all yous demand to do is to create a work plane that represents the block surface and then draw the circumvolve on that piece of work plane's geometry. Then finalize the geometry (by moving on to the physics settings, for example). The circle and so defines a split surface then that y'all tin specify some other boundary condition in that area. See the attached screen shot. Best regards, Magnus Ringh, COMSOL



Olivia Van

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Posted: i decade ago Mar xi, 2011, 4:38 p.thousand. UTC

Excellent! Thank you both.

First-class! Thank you lot both.


aroth

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Posted: 1 decade ago Apr vi, 2011, 8:03 p.m. UTC

Hello,
How do yous create this work plane on a curved surface, say on a sphere? I want to create a boundary area that is on the surface of a hemisphere. Capeesh any communication, cheers!

Austin

How-do-you-do, How do y'all create this work plane on a curved surface, say on a sphere? I want to create a boundary area that is on the surface of a hemisphere. APpreciate any advice, thank you! Austin


Ivar Kjelberg "Retired" but still part time CSEM SA (CH)

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Posted: ane decade ago Apr 7, 2011, v:52 a.thou. UTC

Hullo

you accept different options to define your workplane: the "quick mode" see the options, typically forth the coordinates, or on a surface, or via a set of points, upward to y'all to ascertain/precise for the programme

--
Expert luck
Ivar

Hi you take unlike options to define your workplane: the "quick way" come across the options, typically along the coordinates, or on a surface, or via a set of points, up to yous to define/precise for the programme -- Skillful luck Ivar


LiWah Wong

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Posted: 1 decade ago Jun 20, 2011, 3:36 p.yard. UTC

Hi there

I am working with iv.0, I created a piece of work plane and drew a circle, but when I become over to one of the physics, the circle is gone and I cant fifty-fifty assign whatsoever physics to the circle. Any clues?

thank you!

liwah


Hi,

In four.1, the "embedding" is implicit, and then all you demand to exercise is to create a work plane that represents the block surface and and then draw the circle on that work plane'southward geometry. And so finalize the geometry (past moving on to the physics settings, for example). The circle then defines a carve up surface and then that yous tin can specify another boundary condition in that area. See the attached screen shot.

Best regards,
Magnus Ringh, COMSOL

Hullo at that place I am working with 4.0, I created a piece of work plane and drew a circumvolve, only when I go over to 1 of the physics, the circle is gone and I cant even assign any physics to the circumvolve. Whatsoever clues? thanks! liwah [QUOTE] Hi, In iv.ane, the "embedding" is implicit, so all you need to practise is to create a work plane that represents the cake surface and then draw the circle on that piece of work plane's geometry. Then finalize the geometry (by moving on to the physics settings, for example). The circumvolve then defines a separate surface so that you can specify another boundary condition in that area. See the attached screen shot. All-time regards, Magnus Ringh, COMSOL [/QUOTE]


Jianshan Liao

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Posted: 6 years ago October 13, 2015, xi:09 p.m. UTC

How-do-you-do Magnus,

Cheers for sharing! I came across this mail service as I encountered similar problems. I followed the steps and built a circumvolve on the piece of work plane. But when I become Helmholtz Equation (hzeq), the circle on that piece of work aeroplane is not included in the "all domain" selection. I cannot add source value to the circle. Is at that place any step I miss? How can I solve the problem? I'm using comsol v.1. Fastened is a figure showing the event.

Cheers in advance for your response!

Jianshan

How-do-you-do Magnus, Cheers for sharing! I came across this post every bit I encountered like bug. I followed the steps and built a circle on the work airplane. Only when I go Helmholtz Equation (hzeq), the circle on that work airplane is not included in the "all domain" option. I cannot add together source value to the circle. Is there any step I miss? How tin can I solve the problem? I'k using comsol 5.1. Attached is a figure showing the issue. Cheers in advance for your response! Jianshan



Jeff Hiller COMSOL Employee

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Posted: 6 years ago April 19, 2016, iii:23 p.m. UTC

How-do-you-do Jianshan,
A disc is not three-dimensional, so it does not define a domain in 3D and you tin can therefore non assign an equation to exist solved on a 3D domain to it. In 3D, you could use a disc to assign a boundary condition, or a PDE defined on a surface, etc.
Best,
Jeff

Hello Jianshan, A disc is not 3-dimensional, so it does non define a domain in 3D and you can therefore not assign an equation to exist solved on a 3D domain to it. In 3D, yous could utilize a disc to assign a boundary status, or a PDE defined on a surface, etc. Best, Jeff


Jeff Hiller COMSOL Employee

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Posted: vi years ago April xix, 2016, three:46 p.m. UTC

Hello Austin,
In that case you do not use a work airplane: work planes are by definition planes, they cannot exist curved.
Instead, what yous do is that you create a 3-dimensional object that intersects with the curved surface so that their intersection creates the shape you need, as shown in the fastened toy model.
All-time,
Jeff

Hi Austin, In that instance you do not use a work airplane: work planes are past definition planes, they cannot exist curved. Instead, what you do is that you create a 3-dimensional object that intersects with the curved surface so that their intersection creates the shape you need, as shown in the attached toy model. All-time, Jeff



Sivaharan Rajkumar

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Posted: 5 years agone Apr 21, 2017, 5:55 a.m. UTC

@Jeff Hiller.

Cheers for your responses to questions, years after. And also providing examples. This is the second time your response has been a aid.

@Jeff Hiller. Cheers for your responses to questions, years subsequently. And also providing examples. This is the second time your response has been a help.

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Source: https://www.comsol.com/forum/thread/15263/How-to-draw-a-circle-on-a-surface-of-a-block-in-3D-geometry-view-COMSOL-41

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