Water at 10 C flows in a 3-cm-diameter pipe at a velocity of 1.5 m/s. The Reynolds number for this flow is ? 34420 QUESTION 2 Air at 1 atm and 20 C flows in a 2.5-cm-diameter tube. The maximum velocity (m/s) of air to keep the flow laminar is ? 1.64 QUESTION 3 Consider laminar flow of water in a 0.9-cm-diameter pipe at a rate of 1.25 Lmin. The velocity (m/s) of water halfway between the surface and the center of the pipe is ?

Water at 10 C flows in a 3-cm-diameter pipe at a velocity of 1.5 m/s. The Reynolds number for this flow is ? 34420 QUESTION 2 Air at 1 atm and 20 C flows in a 2.5-cm-diameter tube. The maximum velocity (m/s) of air to keep the flow laminar is ? 1.64 QUESTION 3 Consider laminar flow of water in a 0.9-cm-diameter pipe at a rate of 1.25 Lmin. The velocity (m/s) of water halfway between the surface and the center of the pipe is ?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.3P: 6.3 Steam at 100 kPa and is flowing across a 5-cm- OD tube at a velocity of 6 m/s. Estimate the...

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6.1 Determine the heat transfer coefficient at the stagnation point and the average value of the heat transfer coefficient for a single 5-cm-OD, 60-cm-long tube in cross-flow. The temperature of the tube surface is , the velocity of the fluid flowing perpendicular to the tube axis is 6 m/s, and the temperature of the fluid is . Consider the following fluids: (a) air, (b) hydrogen, and (c) water.
6.3 Steam at 100 kPa and is flowing across a 5-cm- OD tube at a velocity of 6 m/s. Estimate the Nusselt number, the heat transfer coefficient, and the rate of heat transfer per meter length of pipe if the pipe is at .
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