You design a parallel plate press in order to mass-produce pizza crusts that you can sell to local restaurants. unfortunately, while a simple cleaning fluid is between the plates, the press breaks and the top plate starts rotating at a constant rate. at exactly this moment, your boss enters the lab and realizes what you’ve been wasting time and funding on. yikes. the lower disk (at z = 0) is stationary, and the upper disk (z = w) rotates with angular velocity β. the angular velocity is small enough that the fluid is in creeping flow, meaning that the fluid does not spread out radially despite the spinning. i simplify all equations of continuity and equation of motion for this flow field. clearly state any assumptions.
