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how to implement the van der pol boundary condition

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Old   February 13, 2015, 16:37
Default how to implement the van der pol boundary condition
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JING
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Hi, I am a beginner of using OpenFoam. I need to implement a mixed boundary condition which is the kind of van der pol boundary condition for the wave equation: there are three different types:
(1) u_{\tau}=0$ $\tau$ is the vector parallel to the $y$ axis at each point.
(2) u_x+2 u_t=0$
(3) u_x=0.5 u_t-{u_t}^3$
Any ideas are welcome.
Thanks!!

Last edited by tina90; February 14, 2015 at 14:54.
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Old   February 14, 2015, 14:55
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waiting for help
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Old   February 15, 2015, 22:28
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any ideas?
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