Consider a hot automotive engine, which can be approximated as a 0.5-m-high, 0.40-m- wide, and 0.8-m-long rectangular block. The bottom surface of the block is at a temperature of 80°C. The ambient air is at 20°C, and the road surface is at 25°C. The flow is assumed to be turbulent over the entire surface because of the constant agitation of the engine block. By analyzing the parallel flow over the late, calculate the rate of heat transfer from the bottom surface of the engine block by convection as the car travels at a velocity of 80 km/h. Given Kair = 0.02735 W/m°C, vair=1.798×105 m²/s, and Pr = 0.7228

Consider a hot automotive engine, which can be approximated as a 0.5-m-high, 0.40-m- wide, and 0.8-m-long rectangular block. The bottom surface of the block is at a temperature of 80°C. The ambient air is at 20°C, and the road surface is at 25°C. The flow is assumed to be turbulent over the entire surface because of the constant agitation of the engine block. By analyzing the parallel flow over the late, calculate the rate of heat transfer from the bottom surface of the engine block by convection as the car travels at a velocity of 80 km/h. Given Kair = 0.02735 W/m°C, vair=1.798×105 m²/s, and Pr = 0.7228