c) Flow in the concentric annulus with stationary inner and outer pipes (Fig. 3). R₂ R₁

m Problem 6: The top wall moves with velocity Vtop = 1 S and the bottom wall is stationary. Inside there is a layer of water and a layer of oil on top. Both layers have the same thickness and the total thickness is h=2m. The flow is incompressible, laminar and steady and both fluids are Newtonian. The viscosity of water is uw =|10-3)Pa s and the density is Pw 103 Kg. The viscosity of oil is He 10-1 Pas and the density is Po 3° kg tit 700- {There is no pressure gradient./The width is w= 5m. m3 Veap h=2m water

Pipes in Answer have a constant volumetric flow rate and head loss is the summation of parts. Pipes in Answer loops have a constant pressure loss and volumetric flow rate is the summation of parts. branches parallel series