A fluid has 36 times the dynamic viscosity of water at 68 F and a density of 73 lbm/ft^3. What is the kinematic viscosity in ft^2/s? (multiply your answer by 1,000,000 before entering the value)
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A liquid has a mass of 1000 kg and a volume of 0.952 m^3. Find the specific weight of the liquid in kN/m^3. If the viscosity of water at 68 °F is 0.01008 poise, compute its absolute viscosity (μ) in pound-seconds per square foot. Approximately what pressure must be applied to water at 60 °F to reduce its volume by 2.5 percent? A lubricant oil at 68 °F weighs about 1.85 lb. Calculate its specific gravity if the density of this oil is 1.72 slugs/ft^3.
Adi S.
A fluid with a specific gravity of 0.92 has a kinematic viscosity of $5 \times 10^{-4} \mathrm{~m}^{2} / \mathrm{s}$ What is the dynamic viscosity of the fluid?
Problem 2 (use methodology—but not the Energy Eq.): Calculate the pressure drop (psi) in a 100-foot long pipe of one-inch diameter with water flowing at 15 ft/s (psi?). Follow the above grading rubric and as always include discussion/comments (viscosity properties can be found in textbooks/internet). Assume a fluid temperature of 100°F. What is the mass flow? Problem 3 (use methodology): Repeat Problem 2 for air at atmospheric pressure flowing in a 2-foot diameter duct (psi and inches of water?). Same velocity, temperature, and length as in 2. What is the flow rate in lbm/s and cfm (cubic ft/min)? Problem 4: Compare Problem 2 and 3 answers and draw major conclusions about water and air flow pressure drops. Problem 5 (use a variation of the methodology): Recalculate pressure drops in Problems 2 and 3 by lowering the fluid temperature to 40°F from the original 100°F. You can use ratios rather than redoing all of the original calculations since the temperature lowering affects viscosity, which then affects the other parameters such as Re #, friction factor, and pressure drop. Analyze, discuss, and draw major conclusions about temperature effects.
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