HYDRODYNAMIC FORCE H028
Hydrodynamic force is generated any time you try to compress a liquid.
We generate hydrodynamic force between the lapped seal faces because of the small amount of waviness that is always present in lapped surfaces.
If you trap water in the tread of your automobile tires you can generate a hydrodynamic lifting force that will raise the automobile off the road. We call this hydroplaning.
Please see: hydrodynamic seal