How to add a vertex boundary condition on a general PDE model

I'm really confused about how to add a vertex boundary conditions to a general PDE.

The input parameters of the function 'applyBoundaryCondition(model,"dirichlet",RegionType,RegionID,Name,Value)' does not include vertex, although it is included in the comment as shown in the figure below.

I looked through a lot of documentation in MathWork and found that I can only set the vertexBC on 'femodel'.

But the type of 'femodel' just include "structuralStatic", "structuralModal", "structuralTransient", "structuralFrequency", "thermalSteady", "thermalModal", "thermalTransient", "electrostatic", "magnetostatic", "electricHarmonic", "magneticHarmonic", or "dcConduction".

So I sincerely ask everyone what can I do now. Thank you very much for your help!

Answer 1

[Torsten]

A vertex has no area. So from the physical standpoint, a boundary condition in a single vertex doesn't make sense.