oscillating wall
 

I have just learned CFD in a week, and i am very new at this. My task is to model the flow around an airfoil as it moves past a wavy wall (ie: a spinning turbine in a non cylindrical housing). The vane/blade has been set up previously with the approiate rotating reference frame. Now i wish to model the wavy wall by oscillating the wall up and down while doing a transient analysis. Is there a better way to do this? If not, how do I do this. I know it is possible, but i am not experienced enough to know how to do it. Can anyone help?

Bryan