Originally Posted by ViperTX I wonder what the friction is from one molecule of air rubbing against another molecule....but then again it's really the coefficient of a molecule of air rubbing against the bearing hub.....hmmmmmm....anyone measured that?? |
If you could knew the density in relation to the pressure its under it wouldn't really be that hard.
Drag=1/2 x V^2 x density in slugs x area^2[ft] [I believe is the formula-- working from memory here]
You'd need to know the pressure at which the table or unit is working at, and then translate that into density in slugs and the rest is pretty much history. The V^2 part would relate to the mass flow of the air in CFM divided by the airgap and area of the system. On a system which was a disk w/ the air induced in the center the pressure would disipate and the flow would slow the farther from the center of the disk. On a plate w/ many many holes your issue becomes much more complex. However for ruff numbers you could just assume an average and get pretty close.
Jerry