Q2/Engine oil at 80°C flows over a 6-m-long flat plate whose temperature is 30°C with a velocity of 3 m/s. Determine the total drag force and the rate of heat transfer over the entire plate per unit width.
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- 60°C glycerin flows over a 15m long flat plate with temperature of 20°C. The velocity of glycerin is 10m/s. Determine the total drag force and the rate of heat transfer per unit width of the entire plate.A 4m x 4m flat piale maintained at a constant temperature of NOC is subjected to parallel flow of nit at I am. 20 ', and 10 m's. The total drag force acting on the upper surface of the plate is measured to be 2.4N Determine the average convection hear transfer coefficient, and the rate of heat transfer between the upper surface of the plate and the air. The properties of air at 20 ° C and 1 atm from tables, areAir at 10°C and 1 atm is flowing parallel at a velocity of 15.5 m/s over the top flat surface of copper plate. The top surface of the copper plate is 0.03m by 0.03m square. The temperature of copper plate is uniform at 65.6°C. For laminar flow, calculate the dimensionless Reymolds number (Nre) and Nussel number (NNu). Table A.3-3a. Physical Properties of Air at 101.325 kPa (1 Atm Abs), SI Units Bx (Bp²/1?) T (kJ/kg · u x T (Pa ·s, k (W/m 103 (1/K • (°C) T (K) (kg/m³) K) -17.8255.41.379 1.0048 1.62 × 6s or kg/m · s) · K) Npr (1/K) m³) 0.022500.7203.92 2.79 x 108 O 273.21.293 1.0048 1.72 × (0-5 0.024230.7153.65 2.04 × 108 10.0 283.21.246 1.0048 1.78 ×/0 0.024920.7133.53 1.72 x 108 37.8 311.01.137 1.0048 1.90%/0-S 0.027000.7053.22 1.12 x 108 Select one: O A. NRe = 27826.58; NNu =98.58 O B. NRe = 23215.74; NNu =152.68 O C. NRe = 27826.58; NNu = 152.68 O D. NRe = 23215.74; NNu =98.58
- Air at 20°C and with I Bar Pressure is flowing over a flat plate at a velocity of 2.801 m/s. If the plate is 27.5 cm wide and at 60°C, calculate the value of Boundary layer thickness, Average friction coefficient, Shear stress due to friction, Local convective heat transfer coefficient, Average heat transfer coefficient, Rate of heat transfer by convection and Total Drag on the plate.The properties at 40°C are:Density: 1.1298 kg/m³, cp= 1.004 kJ/kg C, k- 0.02774 w/m'C, Kinematic viscosity is 17.13 x 10°Air at 27 ⁰C and 1 atm flows over a flat plate at a velocity of 3m/s, assuming the plate is heated its entire length to a temperature of 70⁰C. Heat transferred in first 25 cm of the plate is?Atmospheric air is in parallel flow (u∞ = 10 m/s, T = 15°C) over a flat heater surface that is to be maintained at a temperature of 90°C. The heater surface area is 0.25 m², and the airflow is known to induce a drag force of 0.17 N on the heater. What is the electrical power, in kW, needed to maintain the prescribed surface temperature? Use the modified Reynolds or Chilton-Colburn analogy. Evaluate properties for the air at 325 K. q= i kW
- 4. During a cold winter day, wind blows parallel to a 4 m high and 10 m long wall of a house. If the air outside is at 5°C and the surface temperature of the wall is 15°C, The general non-dimensional correlation for flow over a flat plate is: Nu =(0.037 Re, 0.8-871) Pr¹/3 where the fluid properties are evaluated at the bulk temperature. If the wind blows at 55 km/h, determine: i. the Reynolds number ii. the convection heat transfer coefficient, and iii. the rate of heat transfer from the wall.55°C methanol flows over a 4m long 2m width flat plate with temperature of 25°C. The velocity of methanol is 1.08 km/h. Determine the total drag force and the rate of heat transfer from the entire plate. What is the value of x_ and what does it mean?Find out the local convection coefficient for a flow over a flat plate at a distance of 0.2 m from the leading edge. The fluid is water at 60°C with a velocity of 2 m/s. The plate maintains a uniform temperature. Assume the film temperature to be 40°C. 64429 W/m²K Is the flat plate losing heat to or gaining heat from the water flow? Justify.
- - Engine oil at 20°C is forced over a 20-cm-square plate at a velocity of 1.2 m/s. The plate is heated to a uniform temperature of 60°C. Calculate the heat lost by the plate, and the drag force exerted on the first 40 cm of the plate using the analogy between fluid friction and heat transfer.. Castor oil at 36 °C flows over a 6 m long and 1 m wide heated plate at 0.06 m/s. For a surfacetemperature of 96 °C, determine (i) the thermal boundary layer thickness at the end of the plate,(ii) the local heat transfer coefficient at the end of the plate, and (iii) the rate of heat transfer fromthe entire plateQuestion 1 15 points Save Answ Engine oil at 87°C flows over the upper surface of a 5-m-long flat plate whose temperature is 18°C with a velocity of 5 m/s. Determine the total drag force and the rate of heat transfer per unit width of the entire plate (Insert answer for Fp, h and Q) W/m2K kW