Answered: Ql: Explain and sketch the boundary…

Ql: Explain and sketch the boundary layer over a horizontal flat plate, then write the equations that gives the boundary layer thickness for laminar and turbulent flow.

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 5.29P: Air at 20C flows at 1 m/s between two parallel flat plates spaced 5 cm apart. Estimate the distance...

See similar textbooks

Related questions

Q: 7. A flat plate has a length of 40 cm and width of 1 m. Air, at pressure of 2 atm, temperature of 57…

Q: A ship is 150 m long and has a wetted area of 5000 m2. If it is encrusted with barnacles, the ship…

Q: 5. A supertanker is 300 m long, 80 m wide (beam), and 25 m deep (draft). The ship moves at 14 knots…

Q: Define flow separations both statement and formulations around and along an airfoil in flow…

A: Flow separation: Whenever there is relative movement between a fluid and a solid surface, whether…

Q: Consider a rectangular wing with a NACA 0009 airfoil section spanning the test section of a wind…

Q: Atmospheric air at 20°C flows at 10 m/s on both sides over a 2-m long by 4-m wide flat plate.…

Q: layer, the shear stress at trailing edge and the drag force on one side of plate 2 m long, if it is…

Q: The boundary layer formed as turbulent around the sphere is when ReD = 2.5*10^5 (a) Golf…

A: Re= 2.5×105Golf ball diameter, Dg= 43 mm= 0.043 mSoccer ball diameter, Ds= 222 mm= 0.222 m Note:…

Q: The Blasius boundary layer profile is an exact solution of the boundary layer equations for flow…

A: Writing the sine series as follows,

Q: Derive an expression for turbulent boundary layer thickness over a flat plate

A: Given A turbulent flow in a flat plate To find Turbulent boundary layer expression

Q: Q1: Find the boundary layer thickness (8) equation, the shear stress (to) and the coefficient of…

Q: Explain boundary layer thickness?

A: Boundary layer thickness is described as a vertical distance from the boundary up to the point where…

Q: 2- Oil with a free stream velocity of 2 m/s flows over a thin plate 2m wide and 2m long. Calculate…

Q: For a laminar boundary layer growing on a horizontal flat plate, the boundary layer thickness ? is…

A: The expression for the boundary layer growing over the horizontal plate for laminar flow is:…

Q: Air at 20°C flows at V = 8.5 m/s parallel to a flat plate Fig.. The front of the plate is well…

A: Given that, Temperature of air, T=20 °C,Velocity of air, V=8.5 m/s,Length of plate, L=40…

Q: Skydivers, fl ying over sea-level ground, typically jump atabout 8000 ft altitude and free-fall…

A: Assumptions a) When they fall spread eagled Terminal velocity at 8000 ft can be determined as…

Q: A marine vehicle tows a hollow cylinder of 760 mm diameter and 5.5 m length. The cylinder is fully…

A: Given: The speed of marine vehicle, v = 6 knot = 3.086 m/s The diameter of cylinder, d = 760 mm The…

Q: 04) Define the boundary layer, then find the thickness of boundary layer, shear stress, drag force…

A: A thin layer of a moving gas or liquid in contact with a surface, such as an aeroplane wing or the…

Q: 04) Define the boundary layer, then find the thickness of boundary layer, shear stress, drag force…

A: Given: The velocity profile, u/U = 4(y/δ)-6(y/δ)^5 The length of plate, L = 1 m The width of plate,…

Q: boundary layer for which the velocity profile can be approximated by a power law equation, u/U =…

Q: Estimate the drag force on the fuselage shown below for a cruising speed of 210 m/s at 10,000m.…

A: Given that, crusing speed, v=210 m/s,Height of the plane, H=10,000 m, Drag force is given as,…

Q: Problem 1. What is the Ekman transport driven by a westerly wind of 9 m/s? The geographic latitude…

A: Given data as per questionSpeed of wind=9m/sGeographic latitude=35°NorthDensity of sea water,…

Q: - Use FoilSim to investigate how an aircraft wing produces lift and drag by changing the values of…

A: An airfoil produces lift by applying a downward constrain on the air because it flows past.…

Q: A supertanker is 300 m long, 80 m wide (beam), and 25 m deep (draft). The ship mov at 14 knots…

Q: Q4) Define the boundary layer, then find the thickness of boundary layer, shear stress, drag force…

Q: Flow straighteners are arrays of narrow ducts placed inwind tunnels to remove swirl and other…

A: (a) Write the formula for the drag coefficient for laminar flow over a flat plate.CD=1.328ρULμ1/2…

Q: Problem 1. A smooth plate with length L = 3.0 m and width b = 0.90 m moves through still air at STP…

Q: lows over a flat plat with a velocity of 60 m/s. Calculate boundary-layer thickness at a ce 15 cm…

Q: A thin flat plate 20 cm by 90 cm is immersed in a 1m/s stream of water at 20 °c ( density=998,…

A: Given data: The velocity of fluid over the plate is, v=1 ms The density of water at given…

Q: Explain briefly the advantages of using Von Karman Method in determining the boundary layer…

A: The Von Karman approximation makes it simple to find boundary layer parameters, and the benefits are…

Q: Define the boundary layer_

A: we have to define the boundary layer

Q: Q1: Find the boundary layer thickness (8) equation, the shear stress (to) and the coefficient of…

Q: Briefly explain the advantages of using the Von Karman Approx n determining the boundary layer…

A: The Von Karman approximation makes it simple to find boundary layer parameters, and the benefits are…

Q: A portion of ship’s hull can be idealized as a flat plate, 100ft long. If the ship’s velocity is 10…

A: Given data: L=100 ftv=10 ft/sρ=62.4 lbm/ft³µ=3.0 lbm/hr.ft Need to determine the maximum boundary…

Q: 1 .Water at 15 ºC flows past a 1.5 mm radius small sphere at 5 cm/s. What is most nearly the drag…

A: Data given: Size of the sphere radius ,d= 1.5mm= 0.0015m cross sectional area =…

Q: a) A sphere (Case 1) is modified with a fairing at the back of sphere (Case 2) and a housing (Case…

Q: A thin square flat plate 6 cm is tested for drag in a wind tunnel with air at 100 m/s , and 60 oC…

A: When a plate is kept in a wind tunnel drag force acts on the plate owing to the viscosity of the…

Q: Let the flow straighteners in Fig. form an array of20 x 20 boxes of size a = 4 cm and L = 25 cm. If…

A: given:ρ=1.205kg/m3μ=1.78×10-5kg/msside of square box a=0.04mlength of square box L=0.25mvelocity of…

Question

i need the answer quickly

Ql: Explain and sketch the boundary layer over a horizontal flat plate, then write the
equations that gives the boundary layer thickness for laminar and turbulent flow.

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

Sketch of the boundary layer over a horizontal flat plate:

VIEW

Equations for boundary layer thickness:

VIEW

Step by step

Solved in 2 steps with 2 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

Question A3 a) With the help of sketches briefly describe the main differences between laminar and turbulent boundary layers in relation to friction drag and flow separation. A tug boat is pulling a log raft (Figure QA3) on the surface of a lake at a constant speed of Uboat = 5m/s. The log raft can be modelled as a flat plate (L=20m and W = 5.0m). u ug U boat 8 U Tug Boat rope boat Air Water L -X Log Raft Figure QA3 Assume the boundary layer forming on both sides (air side and water side) of the log raft is two-dimensional and laminar with a second order velocity distribution: W b) By using the Momentum Integral Equation find an expression for the wall shear stress in terms of Reynolds number and then estimate the tensile stress acting on the rope assuming the rope has a circular cross section with a diameter of 15 mm) and the power required to pull it. c) What would be the tensile stress on the rope if we assume the boundary layers on the log raft were turbulent? You may assume:…
Q4) Define the boundary layer, then find the thickness of boundary layer, shear stress, drag force and coefficiet of drag in terms of Re for the velocity profile of laminar boundary layer u/U=4(y/8)-6(y/8)5. Calcate the boundary layer thickness and drag force if the air flows over a sharp edged flat plate 1m long and 0.5m wide at a velocity 0.9m/s, the air density 1.23 kg/m³ and the kinematic viscosity is 1.46*10-5 m/s².
Q1) Briefly explain laminar, transition and turbulent flow based on boundary layer separation.
(b) In two-dimensional boundary layer, shear stress was changed linearly from the solid surface toward y-axis until it reaches the value of zero at y = 8. Based on Table 2 and setting given to you; (i) Derive the equation of displacement thickness and momentum thickness using Von Karman Approximation Method; and (ii) Determine the accuracy of this method in determining the value of displacement thickness and momentum thickness. Table 2: Equation of Velocity Profile Equation u/U = 3(y/8)/2 – (y/8)³/2 Setting 2
3. Use scale analysis to find an expression for S/L and Nu, for flow over a flat plate with both boundary layers of equal thickness (8=ST)
Solve part a. in Matlban with the following changes please: Flow Speed U_inf = 0.5 m/s Plate Surface Temperate Ts = 77 C Describe what each case represents in terms of the boundry layer
QI/ If the velocity profile of the boundary layer is :O find the thickness of boundary layer, the shear stress at trailing edge and the drag force on one side of plate 2 m long, if it is immersed in water flowing with velocity of 0.4 m/s (p 998 D = 1.007*10-6 m2/s %3D
(b) In two-dimensional boundary layer, shear stress was changed linearly from the solid surface toward y-axis until it reach the value of zero at y = 8. Based on Table 2 and setting given to you; (i) Derive the equation of displacement thickness and momentum thickness using Von Karman Approximation Method ; and (ii) Determine the accuracy of this method in determining the value of displacement thickness and momentum thickness. Table 2: Equation of Velocity Profile Equation u/U = 3(y/S)/2 – (y/8)³/2
(b) In two dimensional boundary layer, shear stress was changed linearly from the solid surface toward y-axis until it reach the value of zero at y = 6. Based on Table 2 and setting given to you; () Derive the equation of displacement thickness and momentum thickness using Von Karman Approximation Method ; and (ii) Determine the accuracy of this method in determining the value of displacement thickness and momentum thickness. Table 2 : Equation of Velocity Profile Setting Equation wU = 3(y/8)/2 – (y/8j?/2
Consider again a semi truck traveling at 55 mph on the freeway. The ambient air is at 1 atm and 80F. The trailer of the truck can be considered as a 8-ft-wide, 10-ft-high, 48-ft-long rectangular box. Assuming flat plate boundary layer behavior and no flow separation, estimate the drag force acting on the top and side surfaces and the power [hp] required to overcome this drag. Does the analysis seem reasonable for the actual drag force for the truck? Explain.
We usually think of boundary layers as occurring along solid walls. However, there are other flow situations in which the boundary layer approximation is also appropriate. Name three such flows, and explain why the boundary layer approximation is appropriate.
Q1: Find the boundary layer thickness (6) equation, the shear stress (to) and the coefficient of drag (C₁) if the velocity distribution in the laminar boundary layer over the face of a spillway was observed to be: u 7- (C)-()*+C)*. U Then calculate the boundary layer thickness and drag force if the air flows over a sharp edged flat plate 0.25m long and 0.5m wide at a velocity 1 m/s, take the air density 1.23 kg/m³ and the kinematic viscosity is 1.46*10-5 m/s².