Water at 45° C flows over a large plate at a velocity of 25 cm/s. The plate is 1.2 m long in the flow direction, and its surface is maintained at a uniform temperature of 10° C. Calculate the steady rate of heat transfer per unit width of the plate.
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- A 20degC water flows to 50cmx60cm flat plate with velocity of 6m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent? If the average laminar heat transfer coefficient of water is 7740W/m2 degC, what is the overall heat transfer at the laminar section?A flat plate of width 1 m and length 0.2 m is maintained at a temperature of 32 °C. Water at 22 °C flows across the top of the plate in parallel flow (see diagram below). Determine (a) the average convection heat transfer coefficient, and (b) the convection heat transfer rate from the top of the plate when water has a flow rate of 0.5 m/s. Assume steady-state, and find water properties in the "Given information page". Water w = 1 m L= 0.2 mAir at 200C flowing at 25 m/s passes over a flat plate, the surface of which is maintained at 270°C. Calculate the rate at which heat is transferred from both the sides of the plate per unit width over a distance of 0.25 m from the leading edge. Properties of air at 145°C are Prandtl number = 0.687; Viscosity = 2.8 X 10-5 m2/s and thermal conductivity = 3.49 X 10-5 kW/m.K
- Oxygen gas at a temperature of 27°C at atmospheric pressure flows in parallel at 20 m/s over a square thin plate with a side of 10 cm. Since the plate is held at 127°C, what is the heat transfer from the plate to the fluid? Heat transfer (W) takes place from only one surface of the plateTopic: Heat transfer Completely solve and box the final answer. A 20degC water flows to 50cmx60cm flat plate with velocity of 6m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent? If the average laminar heat transfer coefficient of water is 7740W/m2 degC, what is the overall heat transfer at the laminar section?Water at 45.0oC flows over a large plate at a velocity of 30.0 cm/s. The plate is 1.0 m long (in the flow direction), and its surface is maintained at a uniform temperature of 5.0oC. Calculate the steady rate of heat transfer per unit width of the plate. Properties The properties of air at 1 atm and the film temperature of (Ts+T∞)/2 = (5+45)/2 = 25°C are: ρ = 996.6 kg/m3, k = 0.610 W/m.oC, μ = 0.854x10-3 kg/m.s, Pr = 5.85
- A 20 °C water flows to 50cmx60cm flat plate with velocity of 6m/s . The flat plate surface temperature is maintained at 40 °C The water flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, What is the local heat flux (Q/A) at the end of the plate (k=0.86 W/m deg C, Re=3840000, and Pr=0.7)?Water at a temperature of 25oC flows parallel over a flat plate with free-stream velocity of 2 m/s. The plate surface temperature is uniform at 86oC. Calculate: a) Thermal boundary layer thickness at x = 8 cm from leading edge; b) Local heat flux on x = 8 cm from leading edge; c) Total heat transfer rate in the area of plate L = 8 cm from the leading edge and width w = 10 cm.Air 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
- A 20degC water flows to 50cmx60cm flat plate with velocity of 6m/s . The flat plate surface temperature is maintained at 40deg C. The water flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, What is the local heat flux (Q/A) at the end of the plate (k=0.86 W/m deg C, Re=3840000, and Pr=0.7)? Round your answer to 2 decimal places.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.A long and wide heated plate is maintained at uniform temperature. You have to calculate the flux from the plate if a fluid is flowing over the plate at 1 m/s. The length of the plate in the direction of the flow is 10 m. The fluid is air. Temperature of the plate is 60°C and temperature of average heat 81-3 u 10°C.