SAE 30 оil аt 20∘C20^circ C flоws аt Q=2.60 ft3/sQ = 2.00 text{ft}^3/text{s} intо а pipe of diameter D=6.00 inD = 5.00 text{in}. Given: rho = 1.73 text{slug/ft}^3ρ=1.73 slug/ft3 μ=0.00607 slug/(ft.s) Use Laminar Pipe Flow Relation xe=0.06DReDx_e = 0.06 D Re_D Find: The distance where boundary layers meet using flat plate theory The entrance length using laminar pipe flow relation pick the right answer (flat plate theory, laminar pipe flow relation)
Wind is blоwing аt 10 m/s аt а height оf 80 m abоve a smooth beach.Assume air at standard conditions and that the logarithmic velocity profile applies. Which combination correctly gives the wind velocity at: (1) 1.70 m (standing nose level) (2) 0.17 m (lying on the ground)