5.10 A steel sphere (AISI 1010), 100 mm in diameter, iscoated with a dielectric material layer of thickness2 mm and thermal conductivity 0.04 W/mK. Thecoated sphere is initially at a uniform temperature of500°C and is suddenly quenched in a large oil bath forwhich T = 100°C and h = 3000 W/m² K. Estimate thetime required for the coated sphere temperature to reach150°C. Hint: Neglect the effect of energy storage in thedielectric material, since its thermal capacitance (pcV)is small compared to that of the steel sphere.

The diameter of sphere is The thickness of dielectric matrial is The thermal conductivity of…

5.10 A steel sphere (AISI 1010), 100 mm in diameter, is coated with a dielectric material layer of thickness 2 mm and thermal conductivity 0.04 W/m. K. The coated sphere is initially at a uniform temperature of 500°C and is suddenly quenched in a large oil bath for which Tỵ = 100°C and h = 3000 W/m² · K. Estimate the time required for the coated sphere temperature to reach 150°C. Hint: Neglect the effect of energy storage in the dielectric material, since its thermal capacitance (pcV) is small compared to that of the steel sphere.

5.10 A steel sphere (AISI 1010), 100 mm in diameter, is coated with a dielectric material layer of thickness 2 mm and thermal conductivity 0.04 W/m. K. The coated sphere is initially at a uniform temperature of 500°C and is suddenly quenched in a large oil bath for which Tỵ = 100°C and h = 3000 W/m² · K. Estimate the time required for the coated sphere temperature to reach 150°C. Hint: Neglect the effect of energy storage in the dielectric material, since its thermal capacitance (pcV) is small compared to that of the steel sphere.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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