Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
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Chapter 5, Problem 5.4P
Evaluate the Stanton number for flow over a tube from the following data:
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For a fully developed flow of water in a pipe having diameter 10 cm, velocity 0.1 m/s and kinematic viscosity 10-5 m²/s, the value of Darcy friction factor is
Water at 20°C flows in a long horizontal commercial-steel 6-cm-diameter pipe that contains a classical Herschel venturi with a 4-cm throat. The venturi is connected to a mercury manometer whose reading is h = 40 cm. For water at 20°C, take ρ = 998 kg/m3 and μ = 0.001kg/m⋅s. For commercial steel, ε ≈ 0.046 mm. Take π = 22/7. Take Cd ≈ 0.985.
Estimate the flow rate in m3/h. Round the answer to the nearest whole number.
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Chapter 5 Solutions
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Ch. 5 - Evaluate the Reynolds number for flow over a tube...Ch. 5 - 5.2 Evaluate the Prandtl number from the following...Ch. 5 - Evaluate the Nusselt number for flow over a sphere...Ch. 5 - 5.4 Evaluate the Stanton number for flow over a...Ch. 5 - Evaluate the dimensionless groups hcD/k,UD/, and...Ch. 5 - 5.6 A fluid flows at 5 over a wide, flat plate 15...Ch. 5 - 5.7 The average Reynolds number for air passing in...Ch. 5 - Prob. 5.8PCh. 5 - When a sphere falls freely through a homogeneous...Ch. 5 - 5.10 Experiments have been performed on the...
Ch. 5 - 5.13 The torque due to the frictional resistance...Ch. 5 - The drag on an airplane wing in flight is known to...Ch. 5 - 5.19 Suppose that the graph below shows measured...Ch. 5 - Engine oil at 100C flows over and parallel to a...Ch. 5 - For flow over a slightly curved isothermal...Ch. 5 - Air at 20C flows at 1 m/s between two parallel...Ch. 5 - Air at 1000C flows at an inlet velocity of 2 m/s...Ch. 5 -
5.43 A refrigeration truck is traveling at 130...Ch. 5 - The air-conditioning system in a Chevrolet van for...Ch. 5 - Determine the rate of heat loss from the wall of a...
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- Consider a flow of SAE 30W oil at 20°C through a 2.4-cm-diameter smooth pipe at 1 million N/h. Determine the Reynolds number for this flow. For SAE 30W oil at 20°C, take ρ = 891 kg/m3, μ = 0.29 kg/m-s, and π = 22/7. The Reynolds number isarrow_forwardFLUID FLOWA Venturi meter is being used to determine the flow of soybean oil at 65 °C in a pipe. The particular pipe is 15 cm in diameter, which decreases to 6 cm in the throat of the Venturi. If the differential pressure is measured as 14 cm of water, estimate the flow rate of the soybean oil.(Volume flow rate 0.17 m3/h)(Mass flow rate 153 kg/h)arrow_forwardA fluid with SG: 0,888 and viscosity: 0,8 Pa s flows in a horizontal pipe of diameter :5 cm and length: 40 m .The measured velocity profile is of parabolic shape . The amount of pressure difference between inlet and exit of the pipe is 648,76 kPa. Determine the amount of flow rateANSWER: 0,0031 m3/sarrow_forward
- An oil has 0.62 inch steel tube, through which flows an oil. The properties of oil are as follows; μ = 0.034 lbs/ft-sec, μb = 0.044 lbs/ft-sec, μw = 0.004 lbs/ft-sec, and specific gravity at 60°F is 0.899. The oil neters at a temperature of t1 = 60°F and flows with an average velocity of 4 ft/sec. The inside ssurface area is 0.1613 ft2 per feet length, and the inside sectional area is 0.3019 in2. The length of one pass of the tube is 10 feet. Considering steam at 215°F surround the tubes. Assume that the inside surface temperature of the pipe is 210°F and a bulk temperature of 72°F. If the specific heat of oil is 0.5 btu/lbs-°F and its conductivity k = 0.08 Btu-ft/hr-F-ft2, what is the temperature at the end of 10 feet pass. Show your complete solution and illustration.arrow_forwardWater enters a piping system with a diameter of 0.1016 m from a reservoir with a volumetric flow rate of 0.1893 m³/min. Determine whether the flow is laminar or turbulent if, during the winter, the dynamic viscosities of μ = 1.308x 10-3 Pa 's and 0.687x10-3 Pa s during the summer. What is the length of pipe necessary to reach a fully developed flow?arrow_forwardSAE 30 oil at 20°C flows in the 2.5-cm-diameter pipe as shown in the figure below, which slopes at 37°. For SAE 30 oil, take ρ = 891 kg/m3 and μ = 0.29 kg/m⋅s. Determine the flow rate in m3/h. The flow rate is m3/h.arrow_forward
- The friction loss in laminar flow can be calculated using ____________ A. P.K Swammee and A.K. Jain Equation B. Darcy's equation C. Hazen-Williams Equation D. Hagen-Poiseuille equationarrow_forwardA light liquid (ρ ≈ 950 kg/m3) flows at an average velocityof 10 m/s through a horizontal smooth tube of diameter5 cm. The fluid pressure is measured at 1-m intervals alongthe pipe, as follows: Estimate (a) the total head loss, in meters; (b) the wallshear stress in the fully developed section of the pipe; and(c) the overall friction factor.arrow_forwardEngine oil at 40 C [density 876 kg/m^3, viscosity 0.2177 kg/m.s] flows in a 22-cm-diameter pipe at a velocity of 0.9 m/s. The pressure drop (in Pa) of oil for a pipe length of 24 m is ?"arrow_forward
- A pump is being used to transport a liquid food product (density p=1000kg/m^3, viscosity 0.001 Pa s) from holding tank to filling a machine at a mass flow rate of 2 kg/s. The liquid level in the holding tank is 10 m above the pump, and the filling machine is 5 m above the pump. There is 100 m of 2-in nominal diamter sanitary pipe between the holding tank and the filling machine, wiht one open globe valve and four regular 90° flanged elbows in the system. Within the system, there is a heat exchange which causes 100 kPa of pressure drop due to friction. The holding tank is open to atmosphere, and filling machine is running at a pressure of 1.5 atm. The diamter of the filling machine pipe is 3cm. A: What is the volume flow rate of the system? B: What is the diamete of the pipe? C: What is the average velocity inside the pipe? D: What is the reynolds number of the flow in the pipe? E: What is the flowing type?arrow_forwardA fluid flow in 75mm diameter pipes at a rate of 0.002 m^3/sec. Determine whether the flow is laminar or turbulent Hydrogen (v = 1.28x10^-4 m^2/s) Air (v = 1.41x10^-5 m^2/s) Gasoline (v = 4.09x10^-7 m^2/s)arrow_forwardWater at 10 C flows in a 1.25-cm-diameter pipe at a rate of 1.33 L/min. The hydrodynamic entry length (in meters) isarrow_forward
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