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PROBLEM 4.65
KNOWN:
Long rectangular bar having one boundary exposed to a convection process (T
∞
, h) while
he other boundaries are maintained at constant temperature T
s
.
t
FIND:
Using the finiteelement method of FEHT, (a) Determine the temperature distribution, plot the
isotherms, and identify significant features of the distribution, (b) Calculate the heat rate per unit
length (W/m) into the bar from the air stream, and (c) Explore the effect on the heat rate of increasing
the convection coefficient by factors of two and three; explain why the change in the heat rate is not
roportional to the change in the convection coefficient.
p
SCHEMATIC:
A
SSUMPTIONS:
(1) Steadystate, twodimensional conduction, (2) Constant properties.
ANALYSIS:
(a) The symmetrical section shown in the schematic is drawn in FEHT with the
specified boundary conditions and material property.
The
View

Temperature Contours
command is
used to represent ten isotherms (isopotentials) that have minimum and maximum values of 53.9
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This note was uploaded on 12/07/2010 for the course MAE Heat Trans taught by Professor Lee,j.s. during the Spring '10 term at Seoul National.
 Spring '10
 LEE,J.S.
 Heat Transfer

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