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Shell conduction can be used to account for thermal mass in transient thermal analysis problems such
as soaking. It can also be used for multiple junctions and allows heat conduction through the junctions.
Shell conduction can be applied on boundary walls as well as internal walls.
7.3.1 Physical Treatment
In the case of shell conduction that is applied on a boundary wall, the boundary condition that you
specify on the original wall is applied to the inner surface and the original wall is treated as a coupled
wall (Figure 13.2.4). Note however, that internal emissivity is applied at the outer surface. The shell
boundaries (the sides of the shell zone) need boundary conditions as well. If the wall with shell
conduction is connected to another wall that has no shell conduction, the shell side will take its
boundary condition. The sides will be adiabatic if they are connected to face zones having a boundary
condition type other than a “wall”. If the attached wall has shell conduction, the common sides at the
junction will be coupled.
A Case for Shell Conduction
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