Deposited Beam Power

This node models heat sources brought by narrow beams, such as laser or electron beams, to a given boundary.

Enter a value for the e. This vector does not need to be normalized. In 2D axisymmetric components, it is aligned with the z-axis.

Beam Profile

Either select an option for the among the , or set the it as by entering a value for the , I0 (SI unit: W/m2). The corresponds to the beam intensity in the beam cross section.

For , enter a value for the P0 and the coordinates of the O.

Then, select a : (default) or .

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For , enter the σ.

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For , enter the R. Smoothing can be applied by entering a positive ΔR. The default value of 0 m corresponds to an ideal discontinuous top-hat profile.

Source Position

To display this section click the button (

) and select .

Select a to define a side where the heat source is defined: (default), , or . This setting has no effect unless the temperature differs from one side of the boundary to the other.


	The standard deviation of the Gaussian distribution and the radius of the top-hat distribution can take values smaller than the mesh element size. For more accurate results, it is important to refine the mesh enough at the deposited heat source location. Otherwise, an automatic substitution replaces the standard deviation σ or the beam radius R by the minimum length to get acceptable results which depends on the mesh element size.


	Upside and downside settings can be visualized by plotting the global normal vector (nx, ny, nz), that always points from downside to upside. Note that the normal vector (ht.nx, ht.ny, ht.nz) may be oriented differently. See Tangent and Normal Variables in the COMSOL Multiphysics Reference Manual.

Location in User Interface

Context Menus

Ribbon

Physics tab with interface as , or any version of the Heat Transfer interface selected:

Physics tab with or selected in the model tree: