Answered: 3. (a) Discuss, the concepts of…

3. (a) Discuss, the concepts of velocity boundary layer and temperature boundary layer. Provide some analysis of how and why these two concepts are important in convective heat transfer.

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.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.7P: 5.7 The average Reynolds number for air passing in turbulent flow over a 2-m-long, flat plate is ....

See similar textbooks

Related questions

Q: Air at 400C flows with a velocity of 7 m/s over a 5m long and 4m wilde surface of a flat plate whose…

A: Given data: Air temperature, T = 40°C Velocity, V = 7 m/s Prandtl number, pr = 0.7255 Thermal…

Q: Air at atmospheric pressure and a temperature of 25°C is in parallel flow at a velocity of 5 m/s…

Q: Consider a rectangular fin that is used to cool a motorcycle engine. The fin is 0.15 m long and at a…

A: Given: Surface temperature and length of a rectangular fin. Speed of the motorcycle = u∞=60km/h,…

Q: A thin flat plate of length 1 m separates two air streams flowing in parallel over the opposite…

Q: Fluid flows over a flat plate, 1.2 m long. The direction of flow is along the length of the plate…

A: Given: Flat plate length = 1.2 m Temperature of plate = 283 K Temperature of fluid = 340 K Velocity…

Q: Which of the following statement is wnong? O a. In the boundary layer region the frictional effect…

Q: A food product with 80% moisture content in a 5 cm diameter can wants to be frozen. The density of…

A: GIVEN:tank diameter, d=5cmdensity, p=1000kg/m3area, A=πdlvolume, V=πd2l4initial temp., T=-1.75'C…

Q: Required information Water at 20°C is flowing with velocity of 0.89 m/s between two parallel flat…

Q: Laminar thermal boundary layer and associated temperature distribution related to flow on a flat…

A: Solution: From the given figure, the temperature of the fluid increases from the surface of the…

Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…

Q: Consider a flat plate subjected to parallel flow (top and bottom) characterized by u∞ = 40 m/s, T∞ =…

A: Given: U∞=40m/sT∞=20°CFD=0.075NTs=120°CL=0.2mw=0.2m Pr = 0.704, k = 28.0 × 10-3 W/m⋅K, Cp =1009…

Q: Engine Oil at 58.95 degrees celsius Flows over a 5m long flat plate whose temperature is 20.11…

Q: Consider oil flowing along with a flat plate parallelly. The oil flow creates laminar velocity and…

Q: Air is forced to flow over 15 m long flat plate as shown in the following figure with velocity of…

A: According to the given data L=15m v= 9.9 m/s x=3.9m k=0.03W/mk Pr = 0.7 ν=1.8x10-5 m2/s we need…

Q: A flat-bottom barge is towed on a water surface at 2.57 m/s. The barge is 3.66 m wide and 6.10 m…

A: Given Data The velocity of the barge, V=2.57 m/s Width of the barge, b=3.66m Length of the barge,…

Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…

A: Given data Film Temperature =Tf = 300 KVelocity = v = 1 m/sDistance from leading edge = 20 mm = 0.02…

Q: a) In a methanol production plant, process water at 30°C with a free stream velocity of 0.3 m/s…

A: For part (B) heat transfer coefficient is missing for melting ice. Also as per Bartleby's only parts…

Q: For laminar flow over a hot flat plate, the local heat transfer coefficient decreases with distance…

A: Given question: For laminar flow over a hot flat plate, the local heat transfer coefficient…

Q: (1) Explain the concept of convection heat transfer. What are the methods used for calculating the…

A: To find :- Concept of convective heat transfer and methods used for calculating the heat transfer…

Q: Engine oil at 60°C flows over a 5 m long flat plate whose temperature is 20°C with a velocity of 2…

A: Given :- Too=60oc Ts=20oC Length= l=5m Width =W= unit length =1m Velocity =V=2m/s Density = e= 876…

Q: The heat transfer from a 3 m diameter sphere to a 27 deg C air stream over a time interval of one…

A: Given data:- The heat transfer (q)= 4000 kJ diameter of sphere(d) =3 m air stream temperature…

Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…

A: Given: The temperature of fluid, T = 300 K The speed of fluid, v = 1 m/s The distance from leading…

Q: Electronic components are attached under a thin square plate and the all the energy dissipated by…

Q: For flow over a flat plate of length L, the local heat transfer coefficient hx is known to vary as…

Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…

A: Given data: Film Temperature = Tf = 300 K Fluid velocity = u = 1 m/s Fluids are : Air, Water, Engine…

Q: Consider a flat plate placed inside a wind tunnel, and air at 1 ATM and 20°C is flowing with a free…

A: Given Reynolds number, Re = 2 × 107 Velocity, v = 60 m/s…

Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…

A: Given data: Film Temperature = Tf = 300 K Velocity of flow = u = 1 m/s x = distance from leading…

Q: A 7 cm diameter bed on a 25 cm long bed, as shown in the figure below. The shaft rotates at 3200…

Q: Air at 20°C, 1 atm flows with a velocity of 4.5 m/s over a flat plate having a sharp leading edge.…

A: Given data: The initial temperature of the air is Ti=20°C=293 K The velocity of the air is v=4.5 ms…

Q: Water at a temperature of T∞= 25°C flows over one ofthe surfaces of a steel wall (AISI 1010) whose…

Q: 2. Consider laminar fully-developed flow through two smooth isothermal tubes. One tube has circular…

Q: Small potato balls of 0.5 cm radius (can be approximated as a sphere) baked in the oven and…

A: Given data:-radius of sphere, R=0.5cm=0.005mInitial temperature of sphere, Ti=170°Cdensity of…

Q: (b) In turbulent flows contrast the approaches that are used to represent the velocity profile…

Question

3. (a) Discuss, the concepts of velocity boundary layer
and temperature boundary layer. Provide some analysis of how and
why these two concepts are important in convective heat transfer.

(b) For a flat plate, discuss in your own words, how the rate of heat
transfer and convective heat transfer coefficient are determined for
forced convection and natural (free) convection. In your discussion,
analyse how laminar and turbulent flows are treated

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

5.7 The average Reynolds number for air passing in turbulent flow over a 2-m-long, flat plate is . Under these conditions, the average Nusselt number was found to be equal to 4150. Determine the average heat transfer coefficient for an oil having thermal properties similar to those in Appendix 2, Table 18, at at the same Reynolds number and flowing over the same plate.
Engine Oil at 58.95 degrees celsius Flows over a 5m long flat plate whose temperature is 20.11 degrees celsius with a velocity of 2.2m/s. Determine the rate of heat transfer (W), considering forced convection, per unit width of the entire plate. Density = 876kg/m^3 Thermal conductivity = 0.144W/m-K Pr = 2870 dynamic viscosity = 0.21kg/m-s Q = ?
Air at 20°C, 1 atm flows with a velocity of 4.5 m/s over a flat plate having a sharp leading edge. The plate surface isothermal at 60°C. (a), determine the following parameters at a distance of 1.89m. i)Local convective heat transfer coefficient (ii)Average convective heat transfer coefficient (iii)The heat transfer rate from both sides per unit width of the plate
quickly
PLEASE ANSWER COMPLETELY AND CLEAN FOR AN UPVOTE!!
please answer asap with correct answers and clear solution
Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with velocity of 1 m/s: atmospheric air, water, engine oil, and mercury. For each fluid, determine the velocity and thermal boundary layer thicknesses, in mm, at a distance of 20 mm from the leading edge. Fluid 8 (mm) 8; (mm) Air i 2.819 i 3.164 Water i i Engine Oil i Mercury i i
Only handwritten otherwise skip and dont copy
Ggg
Please don't provide handwritten solution ....
(b) In turbulent flows contrast the approaches that are used to represent the velocity profile within the boundary layer and comment on any limitations that each may offer.
The heat transfer from a 3 m diameter sphere to a 27 deg C air stream over a time interval of one hour is 4000 kJ. Estimate the surface temperature of the sphere if the heat transfer coefficient is 15 W/m^2K.