An experimental arrangement for measuring the thermal
Chapter , Problem 3.141(choose chapter or problem)
An experimental arrangement for measuring the thermal conductivity of solid materials involves the use of two long rods that are equivalent in every respect, 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 rods are attached at one end to a heat source of fixed temperature Tb, are exposed to a fluid of temperature T, and are instrumented with thermocouples to measure the temperature at a fixed distance x1 from the heat source. If the standard material is aluminum, with kA 200 W/m K, and measurements reveal values of TA 75 C and TB 60 C at x1 for Tb 100 C and T 25 C, what is the thermal conductivity kB of the test material?
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