Choose the right answer 1. The mean Nusselt number for fully developed laminar flow in a circular tube under a constant heat flux a. depends on Reynolds number b. depends on Prandtl number c. is constant 2. The value of Prandtl number for air is about а. О.1 b. 0.3 с. 0.7 3. In natural convection heat transfer, the Nusselt number is a function of a. Re and Pr b. Re and Gr c. Grand Pr 4. A fluid is flowing along a plate having a high uniform wall temperature. The heat transfer along the length a. decreases b. remain constant c. increases
Choose the right answer 1. The mean Nusselt number for fully developed laminar flow in a circular tube under a constant heat flux a. depends on Reynolds number b. depends on Prandtl number c. is constant 2. The value of Prandtl number for air is about а. О.1 b. 0.3 с. 0.7 3. In natural convection heat transfer, the Nusselt number is a function of a. Re and Pr b. Re and Gr c. Grand Pr 4. A fluid is flowing along a plate having a high uniform wall temperature. The heat transfer along the length a. decreases b. remain constant c. increases
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 6.40P
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![Choose the right answer
1. The mean Nusselt number for fully developed laminar flow in a circular tube under a
constant heat flux
a. depends on Reynolds number
b. depends on Prandtl number
c. is constant
2. The value of Prandtl number for air is about
а. О.1
b. 0.3
с. 0.7
3. In natural convection heat transfer, the Nusselt number is a function of
a. Re and Pr
b. Re and Gr
c. Grand Pr
4. A fluid is flowing along a plate having a high uniform wall temperature. The heat
transfer along the length
a. decreases
b. remain constant
c. increases
5. For fully developed laminar flow and heat transfer in a heated long circular tube, if the
flow velocity is doubled and the tube diameter is halved, the heat transfer coefficient will
be
a. four times of the original value
before
b. half of the original value
с. same as
d. double of the original value](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3a31117d-76fb-45fd-9ef9-f0c9c4fd6ff8%2Fce1528a6-a17f-4b94-900e-1283f896124b%2Fruvdqp3q_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Choose the right answer
1. The mean Nusselt number for fully developed laminar flow in a circular tube under a
constant heat flux
a. depends on Reynolds number
b. depends on Prandtl number
c. is constant
2. The value of Prandtl number for air is about
а. О.1
b. 0.3
с. 0.7
3. In natural convection heat transfer, the Nusselt number is a function of
a. Re and Pr
b. Re and Gr
c. Grand Pr
4. A fluid is flowing along a plate having a high uniform wall temperature. The heat
transfer along the length
a. decreases
b. remain constant
c. increases
5. For fully developed laminar flow and heat transfer in a heated long circular tube, if the
flow velocity is doubled and the tube diameter is halved, the heat transfer coefficient will
be
a. four times of the original value
before
b. half of the original value
с. same as
d. double of the original value
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