Now, assuming that the pipe in Problem 8.13 has a rough surface and the flow is fully turbulent, compute (a) the equivalent sand roughness diameter, s; and (b) the thickness of the boundary layer...

Now, assuming that the pipe in Problem 8.13 has a rough surface and the flow is fully turbulent, compute (a) the equivalent sand roughness diameter, s; and (b) the thickness of the boundary layer using the Singh criterion for fully turbulent flow from Chapter 7. (c) Is our rough pipe assumption correct?