Homework_3_Solution[1]

# Homework_3_Solution[1] - 2-2C Transient heat transfer is...

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2-2C Transient heat transfer is heat transfer that varies with time while steady heat transfer implies no change with time at any point within the medium. One-dimensional heat transfer is heat transfer that occurs in one direction due to a temperature change in only one direction, and heat transfer in all other directions is negligible or zero. Two dimensional heat transfer is heat transfer that occurs in two directions due to temperature changes in only two directions, and heat transfer is negligible in the other direction. 2-6C A hot dog placed in boiling water will be a two-dimensional, transient heat transfer problem because the hot dog receives heat symmetrically radially and through its ends. Although the water temperature does not change, the temperature of the hot dog will change with time. This problem is best modeled in cylindrical coordinates with the origin at the center of the hot dog. Note: The hot dog could be modeled one-dimensionally since the ends are going to have significantly less surface area than the rest of the hot dog, so heat transfer through the ends will be relatively negligible. 2-13C The heat transfer through an ideal oven is steady once the inside of the oven reaches a specified temperature since the difference of temperature in the oven and its surroundings remains constant. The heat transfer would definitely be multidimensional since it is being analyzed in six different directions

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Homework_3_Solution[1] - 2-2C Transient heat transfer is...

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