A 2 mm diameter copper wire (electrical resistance 1/ke = 2 × 10–6 xcm) carries a current density of I = 1000 A/cm2. The polymer insulating the wire has a thermal conductivity of kI = 10–3 W/cmxK. Air flows past the wire at a flow rate of 26.4 cm/s.
Question 1: What polymer thickness gives the minimum temperature at the metal-insulator interface?
Question 2: What is the temperature at the metal-insulator
interface?
Question 3: What if the fan malfunctions (i.e., cuts off)?
Show your results for the first iteration using an initial guess of R2 = 0.25 cm. You do not need to iterate to find the final value of R2.
A 2 mm diameter copper wire (electrical resistance 1/ke = 2 × 10–6 xcm) carries a current density of I = 1000 A/cm2. Th
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answerhappygod
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