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sine-Gordon equation

Posted 18 nov. 2016, 11:53 UTC−5 Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.0, Version 5.1, Version 5.2, Version 5.2a 0 Replies

Yuriy Yerin
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Hello everybody.

I try to solve numerically the stationary sine-Gordon equation in Comsol 5.2.

uxx-sin(u)=0

on the interval from zero to 2*pi.

Boundary conditions:

u(2*pi)-u(0)=2*pi*n, where n is the integer number
and
ux(0)=ux(2*pi).

I have no problem to set the second boundary condition but I do not understand how I can set the phase difference u(2*pi)-u(0)=2*pi*n ?

Thanks in a advance.
0 Replies Last Post 18 nov. 2016, 11:53 UTC−5
COMSOL Moderator

Hello Yuriy Yerin

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