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EX2: Cylindrical Shell

Homework Problems: Work in groups of two.

Consider the temperature distribution in our answer to .



Equation 42

and the plot of the radial temperature distribution.

Problem 43 - homework! :

Change the inner radius to 5mm and the outer radius to 15mm and note the increased curvature of the graph of . How have the temperature and heat flux at the inner wall changed?

Problem 44 - homework! :

In the design of a hair curling iron one would have the following limits

  1. must be below the safe working temperature of the material.
  2. must not be hot enough to burn the hair.
  3. Material usage should be minimized, which affects the thickness of the PVC.

Design a hair curling iron of PVC satisfying these constraints.

 
 
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