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Example 1: Engine oil at 60°C flows over the upper surface of a 5-m-long flat plate whose temperature is 20°C with a velocity of 2 m/s (Figure). Determine the total drag force and the rate of heat transfer per unit width of the entire plate. T= 60°C V= 2 m/s Oil T,= 20°C L = 5 m Properties The properties of engine oil at the film temperature of T, = (T, + T„)/ 2 = (20 + 60)/2 = 40°C are (Table A-14). %3D p = 876 kg/m³ k = 0.144 W/m · °C Pr = 2870 v = 242 × 10-6 m²/s

Example 1: Engine oil at 60°C flows over the upper surface of a 5-m-long flat plate whose temperature is 20°C with a velocity of 2 m/s (Figure). Determine the total drag force and the rate of heat transfer per unit width of the entire plate. T= 60°C V= 2 m/s Oil T,= 20°C L = 5 m Properties The properties of engine oil at the film temperature of T, = (T, + T„)/ 2 = (20 + 60)/2 = 40°C are (Table A-14). %3D p = 876 kg/m³ k = 0.144 W/m · °C Pr = 2870 v = 242 × 10-6 m²/s

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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Example 1: Engine oil at 60°C flows over the upper surface of a 5-m-long flat plate whose temperature is 20°C with a velocity of 2 m/s (Figure). Determine the total drag force and the rate of heat transfer per unit width of the entire plate.
Example 1: Engine oil at 60°C flows over the upper surface of a 5-m-long flat plate whose temperature is 20°C with a velocity of 2 m/s (Figure). Determine the total drag force and the rate of heat transfer per unit width of the entire plate. T= 60°C V= 2 m/s Oil T,= 20°C L= 5 m Properties The properties of engine oil at the film temperature of T,= (T, + T„)/ 2 = (20 + 60)/2 = 40°C are (Table A–14). %3D p = 876 kg/m³ k = 0.144 W/m · °C Pr = 2870 v = 242 × 10-6 m²/s
Transcribed Image Text:Example 1: Engine oil at 60°C flows over the upper surface of a 5-m-long flat plate whose temperature is 20°C with a velocity of 2 m/s (Figure). Determine the total drag force and the rate of heat transfer per unit width of the entire plate. T= 60°C V= 2 m/s Oil T,= 20°C L= 5 m Properties The properties of engine oil at the film temperature of T,= (T, + T„)/ 2 = (20 + 60)/2 = 40°C are (Table A–14). %3D p = 876 kg/m³ k = 0.144 W/m · °C Pr = 2870 v = 242 × 10-6 m²/s
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