COMSOL-Cantilever Resonating in Water

[elph]

I am trying to model a micro-cantilever resonating in water, in order to measure the decrease in the quality factor due to water damping. I tried fluid-structure interaction module but observed no change in quality factor. It worked as if the medium is vacuum.
Can anyone guide me to select the appropriate application modes in COMSOL?
Thanks in advance..

 

[awesomginger]

I don't know if you found the answer to this... but I would be interested If you have. I kind of am more interested in a macroscopic cantilever, but I am curious nonetheless...