Question
In: Mechanical Engineering
1)Write the one-dimensional heat diffusion equation with thermal generation per unit volume and constant properties, assuming...
1)Write the one-dimensional heat diffusion equation with thermal generation per unit volume and constant properties, assuming unsteady heat transfer.
2)
Consider two identical pin fins, however one of the pin fins has a diameter which is 2X larger than the other. Comment on the effect this may or may not have in terms of efficiency and effectiveness.
Now consider two plate fins which are identical, however one is 2X thicker, How does this effect the efficient and effectiveness?
Solutions
samet mamat answered 1 year agoRelated Solutions
Consider a plane wall with uniform thermal energy generation per unit volume of qdot. Starting with...
Consider a plane wall with uniform thermal energy generation per
unit volume of qdot. Starting with the steady-state heat equation,
obtain a general expression for the temperature distribution (Since
no boundary conditions are provided, there will be unknown
constants in the resulting equation).
Derive the heat equation for a homogeneous one-dimensional rod with a non-constant crosssection of area A(x)...
Derive the heat equation for a homogeneous one-dimensional rod
with a non-constant crosssection of area A(x) and perimeter P(x).
Suppose that the lateral surface is not insulated and the amount of
heat energy leaving the rod via the lateral surface per unit area
per unit time is proportional to the difference of the temperature
in the rod and the temperature w(x, t) of the air surrounding the
rod (use the coefficient of proportionality α). Furthermore,
suppose that there are no...
Derive the heat equation for a homogeneous one-dimensional rod with a non-constant crosssection of area A(x)...
Derive the heat equation for a homogeneous one-dimensional rod
with a non-constant crosssection of area A(x) and perimeter P(x).
Suppose that the lateral surface is not insulated and the amount of
heat energy leaving the rod via the lateral surface per unit area
per unit time is proportional to the difference of the temperature
in the rod and the temperature w(x, t) of the air surrounding the
rod (use the coefficient of proportionality α). Furthermore,
suppose that there are no...
A homogeneous three-dimensional solid has a heat capacity at constant volume CV that depends on temperature...
A homogeneous three-dimensional solid has a heat capacity at
constant volume CV that depends on temperature T. Neglecting
differences in the transverse and longitudinal waves in the solid,
there are 3N vibrational modes, where N is the number of atoms in
the solid. Here, the solid has N = 3.01 x 1023 atoms which occupy a
total volume V = 18.0 cm3 . There are two transverse shear waves
and one longitudinal wave; all waves have the same speed of...
Write a function to solve the two-dimensional in Matlab, unsteady heat conduction equation with no internal...
Write a function to solve the two-dimensional in Matlab,
unsteady heat conduction equation with no internal heat generation
on a square domain. The length of each side of the square is 1 m.
The function will have the following 4 inputs:
npts
number of grid points in each coordinate direction
nt
number of time steps to take
dt
size of time step (s)
alpha
thermal diffusivity (m2/s)
Use the following initial and boundary conditions:
Initialize the body to T =...
1. Write an introduction about the thermal and mechanical properties of stainless steel and how it...
1. Write an introduction about the thermal and
mechanical properties of stainless steel and how it is suited to
the construction industry
2. Write an introduction about the fire testing in
stainless steel
3. identify problems situated to stainless steel e.g.
cost etc
4. Write up a scope based on this topic
Solve the heat equation (in one dimensional case) for c^2=9, the following boundary and initial conditions:...
Solve the heat equation (in one dimensional case) for c^2=9, the
following boundary and initial conditions:
u(0,t)=u(2Pie,t)=0
u(x,0)=5sinx = 2sin5x
Part One: Write an interactive program to calculate the volume and surface area of a three-dimensional...
Part One: Write an interactive program to calculate the volume
and surface area of a three-dimensional object. Use the following
guidelines to write your program:
Create a word problem that involves calculating the volume and
surface area of a three-dimensional object. Choose one of the
following:
Cube: surface area 6 s2 , volume s3
Sphere: surface area 4πr2 , volume (4.0/3.0) π r3
Cylinder: surface area 2π r2 + 2 π r h, volume π r2 h
Cone: surface area...
Assuming a constant mix of 4 units of Small for every 1 unit of Large. Small...
Assuming a constant mix of 4 units of Small for every 1 unit of
Large.
Small
Large
Total
Sales
$20
$30
Variable costs
15
18
Fixed costs
$48,000
What is the breakeven point in units for Small?
Group of answer choices
6,000 units
2,800 units
4,800 units
4,500 units
Question 17
Answer questions 17-18 using the information below:
Tosla Corporation has invested $1,000,000 in a plant to make
commercial juicer machines. The company plans annual sales of
20,000 juicer machines....
1. Assuming the firm’s sales volume remained constant, would you expect it to have a higher...
1. Assuming the firm’s sales volume remained constant, would you
expect it to have a higher cash balance during a tight-money period
or during an easy-money period? Why? (2 pts)
2. Explain how each of the following factors would probably
affect a firm’s target cash balance if all other factors were held
constant. (3 pts)
a. The firm institutes a new billing procedure that better
synchronizes its cash inflows and outflows.
b. The firm develops a new sales forecasting technique...
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