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An annulus of narrow clearance causes a large pressure drop…

An annulus of narrow clearance causes a large pressure drop and can be used to measure fluid viscosity accurately. A smooth annulus has: L=1.0 m,a=50 mm,b=49 mmL = 1.0\ \text{m}, \qquad a = 50\ \text{mm}, \qquad b = 49\ \text{mm}Oil flows through the annulus at Q=5.00×10−3 m3/s If the measured pressure drop is Δp=250 kPa\Delta p = 250\ \text{kPa} What is the oil viscosity μ\mu in kg/m.s?  

Water at 20∘C20^\circ\text{C} flows from a tank through a 12…

Water at 20∘C20^\circ\text{C} flows from a tank through a 12 \tfrac{1}{2} in commercial-steel pipe. The volumetric flow rate is Q=0.015 ft3/sQ = 0.015\ \text{ft}^3/\text{s}The pipe length is L=105  ftL = 125\ \text{ft}For water at 20∘C20^\circ\text{C}, use ρ=1.94 slug/ft3,μ=2.09×10−5 slug/(ft.s)\rho = 1.94\ \text{slug/ft}^3, \qquad \mu = 2.09\times 10^{-5}\ \text{slug/(ft\cdot s)}For commercial steel, take ε=0.00015 ft\varepsilon = 0.00015\ \text{ft}Assume the tank is open to the atmosphere and determine the water surface elevation hhh needed to maintain the required flow rate. What level hh, in feet,  must be maintained to deliver the required flow ?

Water at 20∘C20^\circ\text{C}  (ρ=998 kg/m3)(\rho = 998\ \te…

Water at 20∘C20^\circ\text{C}  (ρ=998 kg/m3)(\rho = 998\ \text{kg/m}^3)  flows through an inclined pipe of diameter 8 cm8\ \text{cm}. At sections AA and BB, the following data are measured: pA=186 kPa,VA=3.2 m/s,zA=27.50 mp_A = 186\ \text{kPa}, \quad V_A = 3.2\ \text{m/s}, \quad z_A = 27.50\ \text{m}pB=260 kPa,VB=3.2 m/s,zB=9.1 mp_B = 260\ \text{kPa}, \quad V_B = 3.2\ \text{m/s}, \quad z_B = 9.1\ \text{m}   Determine the head loss hfh_f​ for the flow in m.

Heat exchangers often consist of many triangular passages. C…

Heat exchangers often consist of many triangular passages. Consider the triangular duct shown in the figure with:   L=62.0 cm,a=2.0 cm,β=80∘L = 52.0\ \text{cm}, \qquad a = 2.0\ \text{cm}, \qquad \beta = 80^\circ The average fluid velocity is V=2.0 m/sV = 2.0\ \text{m/s} The fluid is SAE 10 oil at 20∘C20^\circ\text{C}, with properties ρ=870 kg/m3,μ=0.104 kg/(m.s)\rho = 870\ \text{kg/m}^3, \qquad \mu = 0.104\ \text{kg/(m\cdot s)} Estimate the pressure drop Δp\Delta p in Pa through the triangular passage.      

Water at 20∘C20^\circ\text{C} (ρ=998 kg/m3)(\rho = 998\ \tex…

Water at 20∘C20^\circ\text{C} (ρ=998 kg/m3)(\rho = 998\ \text{kg/m}^3) flows through an inclined pipe of diameter 8 cm8\ \text{cm}. At sections AA and BB, the following data are measured: pA=186 kPa,VA=3.2 m/s,zA=24.0 mp_A = 186\ \text{kPa}, \quad V_A = 3.2\ \text{m/s}, \quad z_A = 24.0\ \text{m}pB=260 kPa,VB=3.2 m/s,zB=9.1 m   Determine the head loss hfh_f​ for the flow in m.  

An annulus of narrow clearance causes a large pressure drop…

An annulus of narrow clearance causes a large pressure drop and can be used to measure fluid viscosity accurately. A smooth annulus has: L=1.0 m,a=50 mm,b=49 mmL = 1.0\ \text{m}, \qquad a = 50\ \text{mm}, \qquad b = 49\ \text{mm}Oil flows through the annulus at Q=2.60×10−3 m3/s Q = 1.400\times10^{-3}\ \text{m}^3/\text{s} If the measured pressure drop is Δp=250 kPa\Delta p = 250\ \text{kPa} What is the oil viscosity μ\mu in kg/m.s?