Boundary condition in an axisymmetric 2D flow

jinwon park

As I posted before, I am solving axisymmetric 2D underwater explosion. The 200*200cm domain in r and z coordinates corresponds to the fluid domain consisting of water and explosive gas. The bottom is the rigid wall to obtain the reflecting of strong shock wave.

The initial condition is illustrated by the situation that a half circle with raidus 16cm modeling gas bubble is located at x=0cm y=20cm above the rigid bottom plate. As time goes, high pressure impinges against the rigid bottom and wave is reflected.

I initially set the bottom and the left wall as rigid boundaries. I wonder if such boundary impositions in axisymmetric flows were right. Could anyone advice me how to imply axisymmetric flow motions?

Thanks in advance.