Cosmosflow Skim boad

Hello,

I would like to simulate the fluid under the skimboard like this website:

http://blogs.solidworks.com/solidworksblog/2011/06/solidworks_simulation_art_of_skim_boarding.html

I think the simulation is external.

Can someone help me for the boundary condition. I am a little bit lost, which surfaces need to be select for the inlet velocity air and also for the inlet velocity water.

And what is the intial condition 1.

Thank you for your help.

Marilyne

SolidworksFlow Simulation