Heat and Mass Transfer: Fundamentals and Applications
5th Edition
ISBN: 9780073398181
Author: Yunus A. Cengel Dr., Afshin J. Ghajar
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 7, Problem 23P
Water at 43.3°C 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 10.0°C. Calculate the steady rate of heat transfer per unit width of the plate.
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Water at 43.3°C flows over a large square plate at a velocity of 28 cm/s. The plate is 1.2 m long (in the flow direction) and its surface is maintained at a uniform temperature of 10.0°C. The width of the plate is 1.2 m. Calculate the steady rate of heat transfer for the entire width of the plate in watts (W). The properties of water at the film temperature of (Ts + T∞)/2 = (10 + 43.3)/2 = 27°C are ρ = 996.6 kg/m3, k = 0.610 W/m·°C, μ = 0.854 × 10–3 kg/m·s, and Pr = 5.85.
The steady rate of heat transfer per unit width of the plate is ___ W.
Q : Engine oil at 80°C flows over a 10-m-long flat plate whose
temperature is 30°C with a velocity of 2.5 m's. Determine the rate of heat
transfer over the entire plate per unit width. Take the properties of the oil
at film temperature
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 plate
Chapter 7 Solutions
Heat and Mass Transfer: Fundamentals and Applications
Ch. 7 - What is the difference between the upstream...Ch. 7 - What is drag? What causes it? Why do we usually...Ch. 7 - Define the frontal area of a body subjected to...Ch. 7 - Air at 25C and 1 atm is flowing over a long flat...Ch. 7 - Air at 15C and 1 atm flows over a 0.3-m-wide plate...Ch. 7 - Water at 43.3C flows over a large plate at a...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 5.7 The average Reynolds number for air passing in turbulent flow over a 2-m-long, flat plate is . Under these conditions, the average Nusselt number was found to be equal to 4150. Determine the average heat transfer coefficient for an oil having thermal properties similar to those in Appendix 2, Table 18, at at the same Reynolds number and flowing over the same plate.arrow_forwardDetermine the rate of heat loss from the wall of a building resulting from a 16 km/h wind blowing parallel to its surface. The wall is 24 m long and 6 m high, its surface temperature is 27C, and the temperature of the ambient air is 4C.arrow_forwardWater at 43.3°C flows over a large square plate at a velocity of 20 cm/s. The plate is 2 m long (in the flow direction) and its surface is maintained at a uniform temperature of 10.0°C. The width of the plate is 2 m. Calculate the steady rate of heat transfer for the entire width of the plate in watts (W). The properties of water at the film temperature of (Ts + T∞)/2 = (10 + 43.3)/2 = 27°C are p = 996.6 kg/m³, k= 0.610 W/m-°C, μ = 0.854 x 10-3 kg/m-s, and Pr = 5.85. The steady rate of heat transfer per unit width of the plate is W.arrow_forward
- Engine Oil at 58.95 degrees celsius Flows over a 5m long flat plate whose temperature is 20.11 degrees celsius with a velocity of 2.2m/s. Determine the rate of heat transfer (W), considering forced convection, per unit width of the entire plate. Density = 876kg/m^3 Thermal conductivity = 0.144W/m-K Pr = 2870 dynamic viscosity = 0.21kg/m-s Q = ?arrow_forwardCaster oil at 36°C flows over a 6 m long and 1 m wide heated plate at 0.06 m/s. For a surface temperature 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.arrow_forwardAir at 300 degrees Celsius flows over a plate of dimension 0.5 m by 0.25 m. If the convection heat transfer coefficient is 250 Watts per Sq.m Kelvin, determine the heat transfer rate from the air to one side of the plate if the plate is to be maintained at 40 degrees Celsius.arrow_forward
- 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.arrow_forwardWhat is the rate of heat loss through a 4-cm Fiberglass wall of the inside temperature is 22 °C and the outside temperature is 45 °C and windy (17 kph) ? the area of the wall is 100 square meters. Include surface films. Assume the k-value for 4-cm fiberglass is 0.056 W/m. °C and the surface air film coefficient for windy velocity (17 kph) is 0.053 for out film and the inner film Rs value is 0.093 as per the surface film coefficient tables ?arrow_forwardExample 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.arrow_forward
- Principles of Convection Heat Transfer EXAMPLE 7: Air at 5°C and 70 kPa flows over a flat plate at 6 m/s. A heater strip 2.5 cm long is placed on the plate at a distance of 15 cm from the leading edge. Calculate the heat lost from the strip per unit depth of plate for a heater surface temperature of 65°C.arrow_forwardASAParrow_forwardAn average man has abody surface area of 1.8m2 and a skin temperature of 33degrees celcius .The convection heat transfer coefficient for a clothed person walking in still air is expressed as {h,8.6V^0.53}FOR 0.5<v<2m/s,where V is the walking velocityin m/s.Assuming the average surface temperature of the clothed person to be 30degrees celcius, determine the rate of heat loss from an average man walking in still air at 10degrees celcius by convectionat a walking velocity of (a)0.5m/s (b)1.0m/s (c)1.5m/s (d)2.0m/sarrow_forward
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