ME 324
HW #2
15.02.2012
1. Consider a plane composite wall that is composed of two materials of thermal conductivities kA =
0.1 W/m C and kB = 0.04 W/m C, and thicknesses LA = 10 mm and LB = 20 mm. The contact
resistance at the interface b etween the two
Radial Heat Conduction
1. Objective:
To understand the use of the Fourier Rate Equation in determining the rate of heat
flow for steady-state conduction of energy through the wall of a cylinder (radial
energy flow). To use the equation to determine the c
ME 324 LAB2
UNSTEADY STATE HEAT CONVECTION
1. Objective
Using analytical transient-temperature/heat flow charts to determine the thermal diffusivity and
conductivity of a solid sphere from measurements taken on a similar sphere but having different
therma
YEDITEPE UNIVERSITY ENGINEERING FACULTY
MECHANICAL ENGINEERING LABORATORY
ME 324
Convective Heat Transfer from a Wire
1. Abstract:
The present experiment is to examine convective heat transfer from a nichrome wire. The wire is
heated by electrical current
Numerical Analysis Lab
One- dimensional plane wall with a heat generation: q v [W/m3]
L
L
T
T1
T2
T3
x
Boundary Conditions:
Convection boundary condition with h and T at x = L.
Or by symmetry:
1. Insulation at x = 0.
2. Convection boundary condition with
ME 324
PROJECT
Due 26 March 2012
A large stainless-steel plate having a thickness of 5 mm is initially at a temperature of 20C. The plate
is suddenly submerged into boiling water at 100C with the convection heat transfer coefficient of h
= 700 W/m2 C. The
ME 324
1.
Radiation Problems
16.05.2012
A disk of 50 cm in diameter is attached to the side of a spaceship in such a way that it is perfectl y
insulated from the inside of the spaceship. One side of the plate is exposed to the radiant heat flux
of 1400 W/
YEDITEPE UNIVERSITY
C O URS E S YL L ABU S
FACULTY OF ENGINEERING AND ARCHITECTURE
2011/2012-2
Course Code-Name ME 324 Heat Transfer
Course Schedule
Monday 14:00-16 :00, Wednesday 11:00-13:00,
LAB: Sec.1: Friday 12 :00-14:00. Sec.2: Friday 14 :00-16:00
In
ME 324
HW #7
11.04.2012
1. Suppose an experiment is conducted as follows: Air at 300 K enters a smooth tube of 0.1 m in
(inner) diameter and 6 m in length with the mass flow rate of 0.002 kg/s. A constant heat flux is
imposed and the outside tube wall is
ME 324
HW #7
11.04.2012
1. Suppose an experiment is conducted as follows: Air at 300 K enters a smooth tube of 0.1 m in
(inner) diameter and 6 m in length with the mass flow rate of 0.002 kg/s. A constant heat flux is
imposed and the outside tube wall is
ME 324
H W #6
02.04.2012
1. Air at 325 K and 70 kPa flows over the upper side of a 1-m-square plate. The upper plate is
maintained at a constant temperature of 375 K.
(1) If air flows at a velocity of 5 m/s, calculate the local convection heat transfer co
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Group 4
1 Fatih
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2 Umut zcan Dkk
3 Cengizhan
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Group 2
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2 Mert
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Group 3
1 Sleyman Deniz
2 Anl
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4
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Group 7
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Group 5
ME 324
HW #1
08.02.2012
1. A freezer compartment consists of a cubical cavity that is 2 m on a side. Assume the bottom to be
perfectly insulated. What is the minimum thickness of styrofoam insulation (k = 0.030 W/m K)
that must be applied to the top and s
1. A freezer compartment consists of a cubical cavity that is 2 m on a side. Assume the bottom to be
perfectly insulated. What is the minimum thickness of Styrofoam insulation (k = 0.030 W/m K)
that must be applied to the top and side walls to ensure a he
ME 324
HW #2
15.02.2012
Each question 15 points
1. Consider a plane composite wall that is composed of two materials of thermal conductivities kA =
0.1 W/m C and kB = 0.04 W/m C, and thicknesses LA = 10 mm and LB = 20 mm. The contact
resistance at the int
ME 324
HW #3
22.02.2012
1. Air flows at 120C in a thin-wall stainless-steel tube with h = 65 W/m2 C. The inside diameter of
the tube is 2.5 cm and the wall thickness is 0.4 mm. The thermal conductivity of the stainlesssteel wall is 18 W/mC. The tube is ex
ME 324
HW #3
22.02.2012
1. Air flows at 120C in a thin-wall stainless-steel tube with h = 65 W/m2 C. The inside diameter of
the tube is 2.5 cm and the wall thickness is 0.4 mm. The thermal conductivity of the stainlesssteel wall is 18 W/mC. The tube is ex
ME 324
HW #4
29.02.2012
1. A triangle fin of copper is attached to a plane wall maintained at 100C. The fin thickness is 6 mm
and the length is 25 mm. The environment is at 40C, and the convection heat transfer coefficient
is 30 W/m2 K. Calculate (1) the
ME 324
HW #4
29.02.2012
1. A triangle fin of copper is attached to a plane wall maintained at 100C. The fin thickness is 6 mm
and the length is 25 mm. The environment is at 40C, and the convection heat transfer coefficient
is 30 W/m2 K. Calculate (1) the
ME 324
HW #5
12.03.2012
1. A boy places his glass marbles in an oven at 200C. The diameter of the marbles is 15 mm. After
a while, he takes them from the oven and places them in room air at 20C to cool. The convection
heat transfer coefficient is approxim
ME 324
HW #5
12.03.2012
1. A boy places his glass marbles in an oven at 200C. The diameter of the marbles is 15 mm. After
a while, he takes them from the oven and places them in room air at 20C to cool. The convection
heat transfer coefficient is approxim
ME 324
H W #6
02.04.2012
1. Air at 325 K and 70 kPa flows over the upper side of a 1-m-square plate. The upper plate is
maintained at a constant temperature of 375 K.
(1) If air flows at a velocity of 5 m/s, calculate the local convection heat transfer co