Domain, Boundary, Edge, Point, and Pair Nodes for the Electromagnetic Waves, Transient Interface
The Electromagnetic Waves, Transient Interface shares most of its nodes with The Electromagnetic Waves, Frequency Domain Interface.
The domain, boundary, edge, point, and pair nodes are available from the Physics ribbon toolbar (Windows users), Physics context menu (Mac or Linux users), or right-click to access the context menu (all users).
In general, to add a node, go to the Physics toolbar, no matter what operating system you are using. Subnodes are available by clicking the parent node and selecting it from the Attributes menu.
Domain
These nodes are unique for this physics interface and described in this section:
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Wave Equation, Electric
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Initial Values
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Drude-Lorentz Polarization
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Far-Field Domain
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Far-Field Calculation
Boundary Conditions
With no surface currents present the boundary conditions
need to be fulfilled. Depending on the field being solved for, it is necessary to analyze these conditions differently. When solving for A, the first condition can be formulated in the following way.
The tangential component of the magnetic vector potential is always continuous and thus the first condition is fulfilled. The second condition is equivalent to the natural boundary condition.
and is therefore also fulfilled.
These nodes and subnodes are available and described for the Electromagnetic Waves, Frequency Domain interface (listed in alphabetical order):
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Magnetic Field
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Perfect Electric Conductor
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Perfect Magnetic Conductor
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Periodic Condition
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Scattering Boundary Condition
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Surface Current Density
Edge, Point, and Pair
These edge, point, and pair nodes are available and described for the Electromagnetic Waves, Frequency Domain interface (listed in alphabetical order):
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Edge Current
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Electric Point Dipole (2D and 3D components)
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Line Current (Out-of-Plane) (2D and 2D axisymmetric components)
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Magnetic Point Dipole (2D and 3D components)
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Perfect Electric Conductor
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Perfect Magnetic Conductor
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Surface Current Density
For axisymmetric components, COMSOL Multiphysics takes the axial symmetry boundaries (at r = 0) into account and automatically adds an Axial Symmetry node to the component that is valid on the axial symmetry boundaries only.
In the COMSOL Multiphysics Reference Manual see Table 2-4 for links to common sections and Table 2-5 to common feature nodes. You can also search for information: press F1 to open the Help window or Ctrl+F1 to open the Documentation window.