Deposited Beam Power, Interface (Heat Transfer in Shells Interface)

This node models heat sources brought by narrow beams, such as laser or electron beams, to the exterior interfaces of a shell and, for the case of a layered shell, to the interfaces between its layers.

Interface Selection

Set the interfaces for which the heat source contribution should be applied. These can be internal interfaces between layers or the top and bottom surfaces. Select the applicable layers (the default setting is ) in the list. If no layered materials have been included yet, there is a shorthand available for creating a , a , or a (the plus, next to the setting).

For a , the heat source is applied on both sides by default. Unselect the and check boxes for another behavior. This setting has no effect unless the temperature differs from one side of the boundary to the other.

When a layered material stack or link is selected from the list, unselect the check boxes corresponding to layer interfaces where the node should not be applied in the table.

You can visualize the selected interfaces by clicking the and buttons.

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For a general description of layer and interface selections, see The Layer Selection and Interface Selection Sections.

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You can provide material parameters with a through-thickness variation by explicitly or implicitly using expressions containing the extra dimension coordinate as described in Using the Extra Dimension Coordinates.


	The desired selection for the node may correspond to boundaries with different layered materials. The All layered materials option allows to gather these materials to make the desired selection applicable for the node on the union of the boundaries where the layered materials are defined. See Layered Material, Layered Material Link, Layered Material Stack, Layered Material Link (Subnode), and Single Layer Material in the COMSOL Multiphysics Reference Manual.

Beam Orientation

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 , Qb (SI unit: W/m2).

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

Then, select a : (the 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.


	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.

Location in User Interface

Context menus

Ribbon

Physics Tab with selected in the model tree: