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Overlay additional nonsolid objects
Posted 03.11.2010, 11:41 GMT-4 4 Replies
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Hello Guys,
In the Comsol Manual there is this statement:
"You can also overlay additional nonsolid objects on top of solid objects to control the distribution of the mesh and to improve postprocessing capabilities. For example, add a curve object to a geometry to control the element size along a 3D curve or add a point to guarantee a mesh vertex in a specific location."
But, as far as I know, there is clear explanation on how to do that.
My problem is the following: I have a 2D geometry in which I solve a fluid problem with a convection-diffusion-reaction problem, since it is strongly convection dominated I need to have a good control of my mesh. In doing that I need to add another curve on a already present Bezier curve - the Bezier curve represents the geometry, the other curve will control the mesh distribution at the wall. How do I do that? Any hints?
Thanks for your time,
Cheers,
J
In the Comsol Manual there is this statement:
"You can also overlay additional nonsolid objects on top of solid objects to control the distribution of the mesh and to improve postprocessing capabilities. For example, add a curve object to a geometry to control the element size along a 3D curve or add a point to guarantee a mesh vertex in a specific location."
But, as far as I know, there is clear explanation on how to do that.
My problem is the following: I have a 2D geometry in which I solve a fluid problem with a convection-diffusion-reaction problem, since it is strongly convection dominated I need to have a good control of my mesh. In doing that I need to add another curve on a already present Bezier curve - the Bezier curve represents the geometry, the other curve will control the mesh distribution at the wall. How do I do that? Any hints?
Thanks for your time,
Cheers,
J
4 Replies Last Post 04.11.2010, 09:27 GMT-4
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Posted:
1 decade ago
Putting it better:
imagine I have a Bezier curve, and I want to split it into two curves in order to assign different properties to the mesh on that line...would be possible to do that?
J
imagine I have a Bezier curve, and I want to split it into two curves in order to assign different properties to the mesh on that line...would be possible to do that?
J
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Posted:
1 decade ago
Hi
I add often a few additional internal boundaries to create "metrology" "hard-nodes" or to spli my parts to ease meshing, mostly thisdoes not change the resolution time
--
Good luck
Ivar
I add often a few additional internal boundaries to create "metrology" "hard-nodes" or to spli my parts to ease meshing, mostly thisdoes not change the resolution time
--
Good luck
Ivar
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Posted:
1 decade ago
Thanks,
yes, this I also do. But, suppose you have a Bezier curve: is it possible to split it in two?
yes, this I also do. But, suppose you have a Bezier curve: is it possible to split it in two?
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Posted:
1 decade ago
Hi
in principle yes, either you know the formuals well enough and you can intersept it, or you might use COMSOL's internal geometry analysis functions, by crossing your Bezier curve by a stright line, depending on how you are treating your model geoemtry ("union" or COMSOL "assembly" mode) Your Bezier might well be cut by the internal geoemtry analyse process. make it a try
--
Good luck
Ivar
in principle yes, either you know the formuals well enough and you can intersept it, or you might use COMSOL's internal geometry analysis functions, by crossing your Bezier curve by a stright line, depending on how you are treating your model geoemtry ("union" or COMSOL "assembly" mode) Your Bezier might well be cut by the internal geoemtry analyse process. make it a try
--
Good luck
Ivar