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Air (can be assumed as an ideal gas) at an ambient temperature of 30°C flows across (perpendicular to the length) a 2.5-m long vertical rod of diameter 50 cm. The approach velocity is measured to be 2.5 m/s. The surface of the pipe is at a uniform 90°C. 10 (a) What is the Grashof number in this situation? 7.67×10 (b) What is the Reynolds number in this situation 65928 (c) Which convection mode is dominant free or forced convection? (d) The surface emissivity of the cylinder is 0.9 and the surrounding temperature is 30°C, what is the radiative heat transfer rate from the cylinder? 17900

Air (can be assumed as an ideal gas) at an ambient temperature of 30°C flows across (perpendicular to the length) a 2.5-m long vertical rod of diameter 50 cm. The approach velocity is measured to be 2.5 m/s. The surface of the pipe is at a uniform 90°C. 10 (a) What is the Grashof number in this situation? 7.67×10 (b) What is the Reynolds number in this situation 65928 (c) Which convection mode is dominant free or forced convection? (d) The surface emissivity of the cylinder is 0.9 and the surrounding temperature is 30°C, what is the radiative heat transfer rate from the cylinder? 17900

Elements Of Electromagnetics
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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Air (can be assumed as an ideal gas) at an ambient temperature of 30°C flows across (perpendicular to the length) a 2.5-m long vertical rod of diameter 50 cm. The approach velocity is measured to be 2.5 m/s. The surface of the pipe is at a uniform 90°C. 10 (a) What is the Grashof number in this situation? 767×10 65928 (b) What is the Reynolds number in this situation (c) Which convection mode is dominant free or forced convection? (d) The surface emissivity of the cylinder is 0.9 and the surrounding temperature is 30°C, what is the radiative heat transfer rate from the cylinder? 1790 w
Transcribed Image Text:Air (can be assumed as an ideal gas) at an ambient temperature of 30°C flows across (perpendicular to the length) a 2.5-m long vertical rod of diameter 50 cm. The approach velocity is measured to be 2.5 m/s. The surface of the pipe is at a uniform 90°C. 10 (a) What is the Grashof number in this situation? 767×10 65928 (b) What is the Reynolds number in this situation (c) Which convection mode is dominant free or forced convection? (d) The surface emissivity of the cylinder is 0.9 and the surrounding temperature is 30°C, what is the radiative heat transfer rate from the cylinder? 1790 w
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