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Transient-(Unsteady-State-Heat-Conduction)

An iron billet (k = 65 W/m K) measuring 20 * 15 * 80 cm is exposed to a convective flow resulting in convection coefficient of 11.5 W/m2 K. Determine Biot number


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This Chapter Transient-(Unsteady-State-Heat-Conduction) consists of the following topics

The lumped parameter solution for transient conduction can be conveniently stated as

An iron billet (k = 65 W/m K) measuring 20 * 15 * 80 cm is exposed to a convective flow resulting in convection coefficient of 11.5 W/m2 K. Determine Biot number

A mercury thermometer with bulb idealized as a sphere of 1 mm radius is used for measuring the temperature of fluid whose temperature is varying at a fast rate. For mercury

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k = 10 W/m K

α = 0.00005 m2/s

h = 10 W/m2 K

If the time for the temperature change of the fluid is 3 second, what should be the radius of thermocouple to read the temperature of the fluid?
For the thermocouple material
k = 100 W/m K
α = 0.0012 m2/s
h = 18 W/m2 K

An iron billet (k = 65 W/m K) measuring 20 * 15 * 80 cm is exposed to a convective flow resulting in convection coefficient of 11.5 W/m2 K. Determine the Biot number

Transient (Unsteady State Heat Conduction)

Heat-Transfer