Homework Answers
Add Answer to:
Use the integral method for boundary layer flow and convective heat transfer over a flat plate he...
Using the Energy Integral Equation (EIE), derive an expression for the average Nusselt number (in terms...
Using the Energy Integral Equation (EIE), derive an expression for the average Nusselt number (in terms of Reynolds and Prandtl numbers) for laminar flow of a fluid over a surface with a free stream velocity of U. (which is a constant). Assume the fluid velocity in the momentum boundary layer is the same as the free stream velocity and (T-Tw)/(To-Tw)=(y/St), where T is the fluid temperature field in the thermal boundary layer, To is the free stream temperature, Twis the...
(b) For a laminar boundary layer on a flat plate the velocity profile uly) is given...
(b) For a laminar boundary layer on a flat plate the velocity profile uly) is given by 0-30:48) where U is the free stream velocity, y is the distance measured normal to the surface of the plate and is the boundary layer thickness. Determine equations for (i) the momentum thickness , and (8 marks) (ii) the boundary layer thickness d. (7 marks)
JESTION 3 [15 MARKS nsider a flow along a flat plate with a boundary layer profile...
JESTION 3 [15 MARKS nsider a flow along a flat plate with a boundary layer profile given by: u 3 y ang Von-Karman momentum integral equation method, determine the value of: i. boundary layer momentum thickness, 0/8 ii. boundary layer thickness, 8x iii. boundary layer displacement thickness. 8*x (15
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2)...
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2) through a plane wall of thickness 8, surface area A and the thermal conductivity k. The thermal resistance for the set up is + (a) AC ) (b) A (i + + ) (c) 2 (na + + n2) (d) A (na + b +h2) (2 pts) An increase in convective heat transfer coefficient over a fin will (a) increase effectiveness (b) decrease effectiveness...
22. Consider the momentum integral equation turbulent boundary layer on an isothermal flat plate. The boundary...
22. Consider the momentum integral equation turbulent boundary layer on an isothermal flat plate. The boundary layer is tripped at x-0. Assume constant properties and velocity. An experiment conducted to measure u and τ showed that for a steady, and τ= 0.0228 ρu® a) Determine the local friction coefficient, Cf/2 b) Using Colburn analogy, obtain an expression for the local Nusselt number.
Consider laminar flow of an incompressible fluid past a flat plate. The boundary layer velocity profile...
Consider laminar flow of an incompressible fluid past a flat plate. The boundary layer velocity profile is given as u = U sin () a. Determine the boundary layer thicknesses 8, 8, as a function of x. Express in terms of Reynolds number. b. Using momentum integral theory, determine the wall shear stress tw, as a func. of x. Express in terms of Reynolds number. C. Determine the friction drag coefficient, Cof-
Mechanical Engineering Heat Transfer chapter &(Internal Convection) will give a like. ONLY SO...
Mechanical Engineering Heat Transfer chapter &(Internal
Convection) will give a like.
ONLY SOLVE PART C and D
Problem 1 (Short Answer) Answer the following questions in 2-4 sentences a. Describe the features of the entrance region and the fully developed region of internal flow. b. Explain why the mean temperature changes along the axial direction in internal flow, while the free-stream temperature does not change in external flow. of constant heat flux and constant wall temperature. expect the velocity boundary...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50 m/s. The plate is 300 cm long and is maintained at 60C. The width of the plate is 2 m. The critical Rec = 5 x 105 The properties are Conductivity k = 0.0263 W/mK, kinematic viscosity nu = v = 15.89 x 10-6 m²/s, Prandtl number is Pr=0.707 Density rho = p = 1.128 kg/m3 1. Determine the critical length Xc 2. Determine...
3). Standard air flows over a flat plate as shown. Laminar Find: boundary layer forms on...
3). Standard air flows over a flat plate as shown. Laminar Find: boundary layer forms on the surface. Assume the boundary (a). Wall shear stress, Fj)! layer bas a cubic velocity profile: (b). Boundary layer thickness, x)! (c). Shape factor (H-8t/0) Momentum integral equation on a flat plate is ax) Ud(u/U) Ху 1m The displacement thickncss and the momentum thickness are Freestream velocity is 1.0 m/s. The fluid viscosity and density are 1.55 x 10 m'ls and 1.23 kg/m, respectively...
Clear solutions please fully worked out for a thumbs up, thanks! . Compare the external flows...
Clear solutions please fully worked out for a thumbs up,
thanks!
. Compare the external flows of two different fluids over a flat plate held at a constant T,; air at a free-stream speed Ux-3 m and temperature Too-250 K to that of engine oil at a free-stream speed Un-3 ! ! and temperature T 400 K. For laminar flow over a flat plate, the velocity boundary layer thickness is given by δ- (In the absence of a known surface...
Using the Energy Integral Equation (EIE), derive an expression for the average Nusselt number (in terms of Reynolds and Prandtl numbers) for laminar flow of a fluid over a surface with a free stream velocity of U. (which is a constant). Assume the fluid velocity in the momentum boundary layer is the same as the free stream velocity and (T-Tw)/(To-Tw)=(y/St), where T is the fluid temperature field in the thermal boundary layer, To is the free stream temperature, Twis the...
(b) For a laminar boundary layer on a flat plate the velocity profile uly) is given by 0-30:48) where U is the free stream velocity, y is the distance measured normal to the surface of the plate and is the boundary layer thickness. Determine equations for (i) the momentum thickness , and (8 marks) (ii) the boundary layer thickness d. (7 marks)
JESTION 3 [15 MARKS nsider a flow along a flat plate with a boundary layer profile given by: u 3 y ang Von-Karman momentum integral equation method, determine the value of: i. boundary layer momentum thickness, 0/8 ii. boundary layer thickness, 8x iii. boundary layer displacement thickness. 8*x (15
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2) through a plane wall of thickness 8, surface area A and the thermal conductivity k. The thermal resistance for the set up is + (a) AC ) (b) A (i + + ) (c) 2 (na + + n2) (d) A (na + b +h2) (2 pts) An increase in convective heat transfer coefficient over a fin will (a) increase effectiveness (b) decrease effectiveness...
22. Consider the momentum integral equation turbulent boundary layer on an isothermal flat plate. The boundary layer is tripped at x-0. Assume constant properties and velocity. An experiment conducted to measure u and τ showed that for a steady, and τ= 0.0228 ρu® a) Determine the local friction coefficient, Cf/2 b) Using Colburn analogy, obtain an expression for the local Nusselt number.
Consider laminar flow of an incompressible fluid past a flat plate. The boundary layer velocity profile is given as u = U sin () a. Determine the boundary layer thicknesses 8, 8, as a function of x. Express in terms of Reynolds number. b. Using momentum integral theory, determine the wall shear stress tw, as a func. of x. Express in terms of Reynolds number. C. Determine the friction drag coefficient, Cof-
Mechanical Engineering Heat Transfer chapter &(Internal
Convection) will give a like.
ONLY SOLVE PART C and D
Problem 1 (Short Answer) Answer the following questions in 2-4 sentences a. Describe the features of the entrance region and the fully developed region of internal flow. b. Explain why the mean temperature changes along the axial direction in internal flow, while the free-stream temperature does not change in external flow. of constant heat flux and constant wall temperature. expect the velocity boundary...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50 m/s. The plate is 300 cm long and is maintained at 60C. The width of the plate is 2 m. The critical Rec = 5 x 105 The properties are Conductivity k = 0.0263 W/mK, kinematic viscosity nu = v = 15.89 x 10-6 m²/s, Prandtl number is Pr=0.707 Density rho = p = 1.128 kg/m3 1. Determine the critical length Xc 2. Determine...
3). Standard air flows over a flat plate as shown. Laminar Find: boundary layer forms on the surface. Assume the boundary (a). Wall shear stress, Fj)! layer bas a cubic velocity profile: (b). Boundary layer thickness, x)! (c). Shape factor (H-8t/0) Momentum integral equation on a flat plate is ax) Ud(u/U) Ху 1m The displacement thickncss and the momentum thickness are Freestream velocity is 1.0 m/s. The fluid viscosity and density are 1.55 x 10 m'ls and 1.23 kg/m, respectively...
Clear solutions please fully worked out for a thumbs up,
thanks!
. Compare the external flows of two different fluids over a flat plate held at a constant T,; air at a free-stream speed Ux-3 m and temperature Too-250 K to that of engine oil at a free-stream speed Un-3 ! ! and temperature T 400 K. For laminar flow over a flat plate, the velocity boundary layer thickness is given by δ- (In the absence of a known surface...
Most questions answered within 3 hours.
-
A marketing executive who knowingly authorizes a shoddy
defective product to be brought to market is...
asked 2 minutes ago -
Write a psudocode:
1. Define a function called authorize that takes in 2 strings,
uName, and...
asked 7 minutes ago -
What Hall voltage (in mV) is produced by a 0.180 T field applied
across a 2.60...
asked 6 minutes ago -
What mass of ethylene glycol (C2H6O2) must be added to 211.0 g
of water to obtain...
asked 9 minutes ago -
Mary's employer has a defined benefits retirement plan, which
pay 3.2% of her last year's salary...
asked 12 minutes ago -
What are the characteristics and behavior of an ethical
manager?
Explain, in your words, what ethics...
asked 29 minutes ago -
1. Which of the following is NOT an argument that McMahan uses
to show that jus...
asked 50 minutes ago -
A crate slides up a frictionless slope. At the end of 3 seconds
its velocity is...
asked 1 hour ago -
Use the following information to answer the next seven
questions.
Suppose there are three potential states...
asked 1 hour ago -
If we only have interstitial and substitutional diffusion, then
what do we consider the process of...
asked 1 hour ago -
You look at yourself in a shiny 9.6-cm-diameter Christmas tree
ball.
If your face is 21.0...
asked 1 hour ago -
If we were to measure the relaxation time of a muscle after
undergoing tetanus compared to...
asked 1 hour ago