## Boundary Condition

Hi all,
I am facing difficulties about boundary condition in Hollow Cylinder. its like wave diffusion equation in hollow cylinder. can anyone help me out to solve this problem. I need some good reverences.
Thank you
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Hi mhmonon! Welcome to PF!
 Quote by mhmonon Hi all, I am facing difficulties about boundary condition in Hollow Cylinder. its like wave diffusion equation in hollow cylinder. can anyone help me out to solve this problem. I need some good reverences. Thank you
We're all very reverend here.

Show us how far you got, and where you're stuck, and then we'll know how to help!
 Recognitions: Science Advisor You need to be more precise with what you are doing. That will directly influence what the BCs are.

## Boundary Condition

here I attached the equation with the boundary value.
 Recognitions: Gold Member Science Advisor Staff Emeritus that is the equation for r, after you have separted variables r and $\theta$. One "unstated" boundary condition is that the function must be finite at r= 0. That gives you one of your constants immediately.