Rework Problem 13.21 but with both disks having diameter D = 0.20 m. Next, consider the coaxial disks to be replaced by aligned squares of length X on a side so that X² = π D²/4. Using a software package such as IHT, graph the upper square and disk temperatures over the range 0 < L ≤ 1 m, where L  is the separation distance between the surfaces.

Data From Problem 13.21

Consider coaxial, parallel, black disks separated a distance  of 0.20 m. The lower disk of diameter 0.40 m  is maintained at 500 K and the surroundings are at  300 K.

What temperature will the upper disk of diameter 0.20 m achieve if electrical power of 17.5 W is supplied to the heater on the back side of the disk?

Transcribed Image Text:

500 K -0.20 m -Heater -0.40 m- 0.20 m