I want to get surface wave.

Hi there.
Thank you for reading my discussion.

I try to build suface wave. I make a rectangular at first and apply a open boundary condition at the top of rectangular , then I use 'Definition->Functions->wave form' on the left side for expressing periodic velocity.
what I want to get is surface wave on the top of rectangular.

for example, it is same phenomenon that you press water-tank on the left side, so you can see the sinusoidal wave on the water.

I think I need to use 'Moving Mesh'.
I would like to know what I should put on the laminar flow and moving mesh.
If you have any good advices about it , please comment here.

Many Thanks.