Heat Source (Heat Transfer in Thin Shells Interface)

This node models a linear heat source (or sink). It adds a heat source q = Ql, q = dsQb, or q = Pb ⁄ L. A positive q is heating and a negative q is cooling.

If this node is selected from the menu, choose the pair on which to apply this condition. A pair has to be created first. See Identity and Contact Pairs in the COMSOL Multiphysics Reference Manual for more details.

Click the (the default) or button.

For , from the list, select (the default) or .

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For enter a value for the distributed heat source, Ql in unit power per unit length. Positive Ql is heating and a negative Ql is cooling.

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For enter the boundary heat source Qb. A positive Qb is heating and a negative Qb is cooling.

For enter the heat rate Pb. In this case Ql = Pb ⁄ L, where L is the total length of the selected edges.


	In 2D components, the equation contains an additional factor, dz, to account for the out-of-plane thickness. This is because the selected points correspond to edges in a 3D geometry.


	You can specify the source to be a harmonic perturbation in a frequency domain analysis. To mark the source as being a harmonic perturbation, right-click the node and choose Harmonic Perturbation. Note that this updates the node’s icon. See Theory for Harmonic Heat Transfer for more details.


	Theory for Heat Transfer in Thin Structures Handling Frames in Heat Transfer

Physics Tab with selected:
Support

with Support as in 3D and in 2D.