A wind tunnel has an incompressible flow of air, flowing horizontally from an inlet section, 7 times the test section. A u-tube is connected, having mercury inside. The mercury's specific weight is 1.33x10^5 N/m^3. Air condition at the inlet section is 1 atm and 280K respectively. Solve for the change in height inside the mercury if the velocity at the throat is 70m/s.

Q: Consider fully developed laminar flow in the annular space formed by the two concentric cylinders shown in the below diagram. The outer pipe is stationary, and the inner pipe moves in the x direction with speed V For pressure gradient, , and the inner cylinder stationary, let ro = R and r = kR, The velocity profile is ax given by: др + 4μ. θα Find: 1- Volume flow rate (Q). 2- An expression for the average velocity (V) 3- Fork → 0, find Q and V 6

Air having density p = 0.981 kg/m³ is flowing in a wind tunnel. A differential manometer connected to a pitot tube is used to measure the dynamic pressure of the air at the pitot tube location. The liquid in the manometer is oil having a specific gravity of 0.826, and the manometer reading is 76.2 mm. The wind tunnel is on the CU campus in Denver where g = 9.796 m/s?. a) Find the dynamic pressure of the air (answer: 615.8 Pa). b) Find the speed of the air at the pitot tube location (answer: 35.4 m/s). Air p = 0.981 kg/m³ h = 76.2 mm Oil, SG = 0.826

A smooth square cylinder is put in 15 °C  flowing water. The flow direction is perpendicular to the long axis of the cylinder (parallel to the square section). The edge length of the square is s=2.0m. The long axis length is L=5.0m.  The flow velocity is v=0.046m/s.  The density of water is ρ=1000kg/m3.  T he dynamic viscosity is η=1.15×10-3kg/m·s. (1) Calculate the Reynold's number Re=_________