Thermal conductivity k is a measure of the ability of a material to conduct heat (Fig. P7–16). For conduction heat transfer in the x-direction through a surface normal to the x-direction, Fourier’s law of heat conduction is expressed as

where Q̇ conduction is the rate of heat transfer and A is the area normal to the direction of heat transfer. Determine the primary dimensions of thermal conductivity (k). Look up a value of k in the appendices and verify that its SI units are consistent with your result. In particular, write the primary SI units of k.

Fig. P7–16.

Transcribed Image Text:

e conduction -KA dT dx