B2) An automotive engine can be assumed as rectangular block with approximationsize 0.4 m high, 0.6 m wide, and 0.7 m long as shown in Figure 6. The ambient air isat 1 atm and 15°C where air density (P) = 1.225 kg/m and kinematic viscosity (v) =1.47x105 m2/s.Air85km/h15°CEngineBlockFigure 6a) Calculate the friction coefficient (C) and investigate the force acting on thebottom surface of the engine block as the car travels at the velocity of 85 km/h.Assume the flow to be turbulent (Cr = 0.074/Re5) over the entire surfacebecause of the constant agitation of the engine block.b) An engine oil at 40°C with kinematic viscosity (v) = 2.485×104 m³/s is flowingover a long flat plate with velocity of 4 m/s. Determine the critical distance xerfrom the leading edge of the plate where the flow become turbulent (Recr =5x105), and analyze the thickness of the boundary layers over a length of 2xer.Given boundary layer thickness for laminar flow is, öx = 4.91x/Re,2 andturbulent flow, õ., = 0.38x/Re,15.

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B2) An automotive engine can be assumed as rectangular block with approximation size 0.4 m high, 0.6 m wide, and 0.7 m long as shown in Figure 6. The ambient air is at 1 atm and 15°C where air density (p) = 1.225 kg/m³ and kinematic viscosity (V) = 1.47x105 m²/s. Air 85km/h 15°C Engine Block Figure 6 a) Calculate the friction coefficient (C) and investigate the force acting on the bottom surface of the engine block as the car travels at the velocity of 85 km/h. Assume the flow to be turbulent (Cı = 0.074/Re5) over the entire surface because of the constant agitation of the engine block. b) An engine oil at 40°C with kinematic viscosity (v) = 2.485×104 m²/s is flowing over a long flat plate with velocity of 4 m/s. Determine the critical distance xer from the leading edge of the plate where the flow become turbulent (Rec = 5x105), and analyze the thickness of the boundary layers over a length of 2xer. Given boundary layer thickness for laminar flow is, o, = 4.91x/Re,12 and turbulent flow, ỗ., = 0.38x/Re,15. %3D

B2) An automotive engine can be assumed as rectangular block with approximation size 0.4 m high, 0.6 m wide, and 0.7 m long as shown in Figure 6. The ambient air is at 1 atm and 15°C where air density (p) = 1.225 kg/m³ and kinematic viscosity (V) = 1.47x105 m²/s. Air 85km/h 15°C Engine Block Figure 6 a) Calculate the friction coefficient (C) and investigate the force acting on the bottom surface of the engine block as the car travels at the velocity of 85 km/h. Assume the flow to be turbulent (Cı = 0.074/Re5) over the entire surface because of the constant agitation of the engine block. b) An engine oil at 40°C with kinematic viscosity (v) = 2.485×104 m²/s is flowing over a long flat plate with velocity of 4 m/s. Determine the critical distance xer from the leading edge of the plate where the flow become turbulent (Rec = 5x105), and analyze the thickness of the boundary layers over a length of 2xer. Given boundary layer thickness for laminar flow is, o, = 4.91x/Re,12 and turbulent flow, ỗ., = 0.38x/Re,15. %3D

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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