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Bloch boundary condition in 2D phononic crystal
Posted Dec 3, 2011, 9:55 a.m. EST Interfacing, Acoustics & Vibrations, Modeling Tools & Definitions, Parameters, Variables, & Functions, Structural Mechanics Version 4.2a 1 Reply
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I am trying to model a 2D phononic crystal in COMSOL. It is essentially a square with a hole at its center. Does anyone know how to set the Bloch boundary condition for the elastic PDE?
Here is the condition:
u(x)=u(x+R)exp(ik.R) or
usrc=udest*exp(ik.R).
where R is the lattice displacement vector.
Note that the normal PBC accessible from COMSOL does not have the phase factor.
Your help would be greatly appreciated.
Hello Karwan Rostem
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I'm looking forward your help sincerely.