Fluid Structure Interaction with Piezoelectric

I was wondering if someone could help me figure out how to model the fluid structure interaction using the piezoelectric device physics model as well. I am trying to model synthetic jet actuators and I am having a hard time coupling the physics together to make the model work. I am new to the fluid structure interaction model so that is probably where my issues are. I am able to get the piezo element to deflect but im not sure how to tie it to the brass element so that deflects and then that deflection causes the fluid in the cavity to displace. If anyone could help me that would be great.

Thanks,
Aaron