Question

3. Consider flow in a pipe with rectangular cross section. We would like you to better understand the rate of work done on the system due to viscous stresses at an inlet or outlet. In class, we gave the expression CS where integration is over the inlets and outlets of the control surface. This calculates the rate of work done on the system due to viscous stresses at the inlets and outlets. This is a very general formula that will work for all shapes of control surfaces. The figure below shows three different inlets/outlets ()-(i) Ey er 1n

Answer 1

x implies component will be connected at dF = i B du sin phi F = integral^pi_0 I B du sin phi = BiR integral^pi_0 sin phi d phi F = I BIR = Mg I = Mg/2BR I implies is anti clock wise.