COMSOL 6.2 - Edge

) to mesh edges in 1D, 2D, and 3D. This is useful not only for intervals in 1D, but also for applications where the physics is solved on edges in 2D and 3D, as seen in Figure 8-51.

Figure 8-51: The image to the left shows the mesh for a pipe flow simulation on edges in 2D. The image to the right shows the edge mesh for beams (highlighted in blue) connected to solids.

You can control the number of elements and the distribution of elements in the edge mesh by using Size and Distribution nodes.

To add an node, select edges in the window, then choose one of the following:

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Right-click in the window and select (

) from The Graphics Context Menu.

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In The Mesh Toolbar, choose from the menu (

) (3D and 2D components) or click (

) (1D components).

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Right-click the node and choose (

) (under in 3D).

Then enter the properties using the following sections:

Entity Selection

To define the edges where you want a create a mesh, first choose the level of the geometric entities from the list:

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Choose to specify an edge mesh for the entire geometry.

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Choose to specify an edge mesh for remaining, unmeshed edges.

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Choose (3D), (2D), or (1D) to specify the edges for which you want to create a mesh. Choose in the list to select the edges in the window, choose a named selection to refer to a previously defined selection, or choose (3D), (2D), or (1D) to select all edges.

Control Entities

Select the check box to smooth the transition in element size across removed Controlling the Mesh Size Using Mesh Control Entities. You can specify the number of smoothing iterations in the field. In the field you can specify the maximum element depth for the mesh points to be smoothed.

Figure 8-52: Comparing meshes where Smooth across removed control entities has been used vs. not used. The two vertices adjacent to the edge in the middle (highlighted in blue in left image) are designated as Mesh Control Vertices and a finer mesh size is set on the edge between them. When all parts of the edge have been meshed, the vertices are removed, leaving only one single edge. With the Smooth across removed control entities check box is selected, the sizes of the edge elements are adjusted to get a smoother transition from large to small mesh elements (upper-right edge). Clear the check box to not adjust the mesh (lower-right edge).

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For a 3D tutorial, see Connecting Beams and Solids:
Application Library path .

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For a 3D tutorial, see Magnetic Field of a Helmholtz Coil:
Application Library path .

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For a 2D tutorial, see Slurry Transport:
Application Library path .

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For a 1D tutorial, see Lithium-Sulfur Battery:
Application Library path .

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