In a vacuum chamber, a thick slab is placed under an array of laser diodes with an
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In a vacuum chamber, a thick slab is placed under an array of laser diodes with an output constant pulse. A thermocouple is inserted inside the slab at 25 mm from the surface and the slab has an initial uniform temperature of 20°C. The known properties of the slab are k = 63.9 W/m · K and a = 18.8 × 10–6 m2/s. If the thermocouple measured a temperature of 130°C after 30 s the slab surface has been exposed to the laser pulse, determine
(a) The amount of energy per unit surface area directed on the slab surface
(b) The thermocouple reading after 60 s has elapsed.
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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