Homework Answers
Add Answer to:
The fluid property that is mostly responsible for the development of the thermal boundary layer is:...
Calculate the boundary layer thickness when a 0.1 cm (diameter) sphere is stirred in a solution...
Calculate the boundary layer thickness when a 0.1 cm (diameter) sphere is stirred in a solution where the relative fluid velocity past the sphere is 15 cm/s, the kinematic viscosity is 0.01 cm2/s, and the diffusivity is 1 × 10−5 cm2/s.
(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...
Use the integral method for boundary layer flow and convective heat transfer over a flat plate he...
Use the integral method for boundary layer flow and convective heat transfer over a flat plate heated by maintaining a constant heat flux q"w, for the case of very low Prandtl number, Pr0. Assume that the free stream velocity of the fluid, U, and free stream temperature, T-do not vary with x. Using the integral form of energy equation, show that under these conditions: (a) the temperature profile, (T- T) is given by, 41 2 CT-T oa (b) the wall...
Deduce a set of boundary-layer differential equations (continuity, momentum, energy) for steady f...
Deduce a set of boundary-layer differential equations
(continuity, momentum, energy) for steady flow of a
constant-property fluid without body forces, and with negligible
viscous dissipation, in a coordinate system suitable for analysis
of the boundary layer on the surface of a rotating disk
Problem # 6 Deduce a set of boundary-layer differential equations (continuity, momentum, energy) for steady flow of a constant-property fluid without body forces, and with negligible viscous dissipation, in a coordinate system suitable for analysis of the...
In the thermal boundary layer over a cylinder in cross flow (Ts >T..) with Rep 10%,...
In the thermal boundary layer over a cylinder in cross flow (Ts >T..) with Rep 10%, starting with the stagnation point, the local convective heat transfer coefficient with angular coordinate 0. Decreases and increases O Decreases, Increases, decreases and increases again Decreases and remains constant after reaching a minimum O Increases and decreases
Consider a boundary layer growing along a thin flat plate. The boundary layer thickness, d, is...
Consider a boundary layer growing along a thin flat plate. The boundary layer thickness, d, is a function of the downstream distance x, free-stream velocity V, fluid density ρ, and dynamic viscosity μ. Which of the following answers is NOT the correct dimensionless parameters representing this physical phenomenon? Group of answer choices (ρ*V*d^2)/(μ*x) , d/x x/d , (ρ*V*d)/μ d/x , (ρ*V*x)/μ (ρ*V*d)/μ , (ρ*V*x)/μ d/x , (ρ*V*x)/(μ*d)
An unknown fluid is forced to flow through a channel of length L, diameter D, and...
An unknown fluid is forced to flow through a channel of length L, diameter D, and roughness E. You know the pressure and temperature changes from sensors at the inlet and outlet of the channel as well as the mass flow rate and heat transfer to the fluid. Find expressions for the specific heat capacity, density, thernal conductivity, and viscosity of this fluid. Assume steady state.
PROBLEM 3 (45 points) The condenser of a large steam power plant is a heat exchanger...
PROBLEM 3 (45 points) The condenser of a large steam power plant is a heat exchanger in which steam is condensed to liquid water. Assume the condenser to be a parallel flow shell-and-tube heat exchanger consisting of a single shell and 1x10 tubes, each executing two passes. The inner diameter of tubes is D = 50 mm and its thickness is 5 mm (Do not ignore the thickness). The steam condenses on their outer surface. Thermal conductivity of the tube...
1) The convection coefficient, (h) for external convection heat transfer depends on the following (with units...
1) The convection coefficient, (h) for external convection heat transfer depends on the following (with units in SI of Watts/(m2 Kelvin): The characteristic length, L The fluid thermal conductivity, k The average fluid velocity, V The fluid viscosity, μ The fluid density, ρ The fluid specific heat, cp Using the Buckingham Pi Theorem, determine a set of dimensionless groups that can be used to correlate test data for this problem. Please show all of your work for this problem (i.e....
Which of the following is least likely to affect the convection heat transfer coefficient? Thermal conductivity...
Which of the following is least likely to affect the convection heat transfer coefficient? Thermal conductivity of the fluid Geometry of the solid body The roughness of the solid surface Type of fluid motion (laminar or turbulent) Fluid velocity Density of the solid body Dynamic viscosity of the fluid
(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...
Use the integral method for boundary layer flow and convective heat transfer over a flat plate heated by maintaining a constant heat flux q"w, for the case of very low Prandtl number, Pr0. Assume that the free stream velocity of the fluid, U, and free stream temperature, T-do not vary with x. Using the integral form of energy equation, show that under these conditions: (a) the temperature profile, (T- T) is given by, 41 2 CT-T oa (b) the wall...
Deduce a set of boundary-layer differential equations
(continuity, momentum, energy) for steady flow of a
constant-property fluid without body forces, and with negligible
viscous dissipation, in a coordinate system suitable for analysis
of the boundary layer on the surface of a rotating disk
Problem # 6 Deduce a set of boundary-layer differential equations (continuity, momentum, energy) for steady flow of a constant-property fluid without body forces, and with negligible viscous dissipation, in a coordinate system suitable for analysis of the...
In the thermal boundary layer over a cylinder in cross flow (Ts >T..) with Rep 10%, starting with the stagnation point, the local convective heat transfer coefficient with angular coordinate 0. Decreases and increases O Decreases, Increases, decreases and increases again Decreases and remains constant after reaching a minimum O Increases and decreases
PROBLEM 3 (45 points) The condenser of a large steam power plant is a heat exchanger in which steam is condensed to liquid water. Assume the condenser to be a parallel flow shell-and-tube heat exchanger consisting of a single shell and 1x10 tubes, each executing two passes. The inner diameter of tubes is D = 50 mm and its thickness is 5 mm (Do not ignore the thickness). The steam condenses on their outer surface. Thermal conductivity of the tube...
1) The convection coefficient, (h) for external convection heat transfer depends on the following (with units in SI of Watts/(m2 Kelvin): The characteristic length, L The fluid thermal conductivity, k The average fluid velocity, V The fluid viscosity, μ The fluid density, ρ The fluid specific heat, cp Using the Buckingham Pi Theorem, determine a set of dimensionless groups that can be used to correlate test data for this problem. Please show all of your work for this problem (i.e....
Most questions answered within 3 hours.
-
In an aqueous mixture of aluminum, lead, and iron salts, which
of these will be reduced...
asked 21 minutes ago -
The probability of college students in the US is given by P(A)=
0.06. The probability of...
asked 3 minutes ago -
The gross payoffs (X) from the investment have the following
probability mass function.
x
p(x)
0...
asked 4 minutes ago -
Water is needed to supply a canal system, which may require up
to 30m3 s -1...
asked 8 minutes ago -
A stubborn dog is being walked on a leash by its owner. At one
point, the...
asked 13 minutes ago -
To convert the money spent on the basket to a useable figure,
economists arbitrarily choose the...
asked 13 minutes ago -
For a particular RLC series circuit, the capacitive reactance is
6.85 Ω, the inductive reactance is...
asked 20 minutes ago -
It is hypothesized that when homing pigeons are disoriented in a
certain manner, they will exhibit...
asked 35 minutes ago -
Copyright protection legislation provides protection for
original works
Select one:
a. until the author is 70...
asked 27 minutes ago -
The boards of 2 major telecommunications companies
recently agreed to a $16 billion merger that would...
asked 26 minutes ago -
What types of evidence are used to reconstruct the history of
ocean chemistry, including changes in...
asked 42 minutes ago -
Describe the steps in Project Planning and Scheduling
WBS
Network Diagram
Developing the Schedule
Preparing the...
asked 36 minutes ago