A heated rod of length L is subject to a volumetric heating h(x) = hož in units of [Wm3], as shown in the figure below. Under the heat supply the temperature of the rod changes along x with the temperature function T(x). The temperature T(x) is governed by the following equations: (−d (9(x)) + h(x) = 0 PDE dx \q(x) = − k dT dx Fourier's law of heat conduction (3) where q(x) is the heat flux through the rod and k is the (constant) thermal conductivity. The left end of the bar is in contact with a heat reservoir at zero temperature, while the right end of the bar is thermally insulated. T(x) h(x) L X

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
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Author:Kreith, Frank; Manglik, Raj M.
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Chapter2: Steady Heat Conduction
Section: Chapter Questions
Problem 2.52P
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A heated rod of length L is subject to a volumetric heating h(x) = h0
x
L
in
units of [Wm−3
], as shown in the figure below. Under the heat supply the
temperature of the rod changes along x with the temperature function
T(x). The temperature T(x) is governed by the following equations:
(

d
dx (q(x)) + h(x) = 0 PDE
q(x) = −k
dT
dx Fourier’s law of heat conduction
(3)
where q(x) is the heat flux through the rod and k is the (constant)
thermal conductivity. The left end of the bar is in contact with a heat
reservoir at zero temperature, while the right end of the bar is thermally
insulated. 

 

Determine:
1. Appropriate BCs for this physical problem.
2. The temperature function T(x).
3. The heat flux function q(x).

A heated rod of length L is subject to a volumetric heating h(x) = hož in
units of [Wm3], as shown in the figure below. Under the heat supply the
temperature of the rod changes along x with the temperature function
T(x). The temperature T(x) is governed by the following equations:
(−d (9(x)) + h(x) = 0 PDE
dx
\q(x) = − k dT
dx
Fourier's law of heat conduction
(3)
where q(x) is the heat flux through the rod and k is the (constant)
thermal conductivity. The left end of the bar is in contact with a heat
reservoir at zero temperature, while the right end of the bar is thermally
insulated.
T(x)
h(x)
L
X
Transcribed Image Text:A heated rod of length L is subject to a volumetric heating h(x) = hož in units of [Wm3], as shown in the figure below. Under the heat supply the temperature of the rod changes along x with the temperature function T(x). The temperature T(x) is governed by the following equations: (−d (9(x)) + h(x) = 0 PDE dx \q(x) = − k dT dx Fourier's law of heat conduction (3) where q(x) is the heat flux through the rod and k is the (constant) thermal conductivity. The left end of the bar is in contact with a heat reservoir at zero temperature, while the right end of the bar is thermally insulated. T(x) h(x) L X
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