Question

An experimental arrangement for measuring the thermal conductivity of solid

material involves the use of two long rods that are equivalent in every aspect, except

that one is fabricated from a standard material of known thermal conductivity kA while

the other is fabricated from the material whose thermal conductivity kB is desired.

Both the rods are attached at one end to a heat source at fixed temperature Tb are

exposed to a fluid of temperature ஶ and are instrumented with thermocouples to

measure the temperature at a fixed distance x1 from the heat source. If the standard

material is aluminium with kA = 200 W/m.k and measurement reveal values of TA =

75oC and TB = 60oC at x1 for Tb = 100oC and ஶ= 25oC, what is the thermal

conductivity kB of the test material​

Answer 1

Answer:

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