For seaworthiness trial of a new ocean-going vessel design, the total convective heat transfer rate of a fully turbulent water flow over a 10-mx2-m side of a flat plate was measured to be 77.2 kW under a specific steady condition in a test setting. The conditions are: velocity of the water is 0.5 m/s along the 10-m side of the surface; water temperature is 18°C; and surface temperature was uniform at 22°C. What is the friction force (skin friction drag) due to the water flow on the surface?

For seaworthiness trial of a new ocean-going vessel design, the total convective heat transfer rate of a fully turbulent water flow over a 10-mx2-m side of a flat plate was measured to be 77.2 kW under a specific steady condition in a test setting. The conditions are: velocity of the water is 0.5 m/s along the 10-m side of the surface; water temperature is 18°C; and surface temperature was uniform at 22°C. What is the friction force (skin friction drag) due to the water flow on the surface?

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

See similar textbooks

Similar questions

What 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 ?
The upper surface of a 1 mx 1 m ASTM B152 copper plate is being cooled by air at 20°C. The air is flowing parallel over the plate surface at a velocity of 0.1 m/s. The maximum use temperature for the ASTM B152 copper plate is 260°C (ASME Code for Process Piping, ASME B31.3-2014, Table A-1M). Determine the average convection heat transfer rate from the plate surface that is required to keep the plate surface temperature from going higher than the maximum use temperature. It is given that the properties of air at the film temperature of 140°C are (Table A-15) Pr = 0.7041, k= 0.03374 W/m-K, and v= 2.745 x 10-5 m²/s. The average convection heat transfer rate is W.
Hot carbon dioxide exhaust gas at 1 atm is being cooled by flat plates as shown in Fig 3. The gas at 220°C flows in parallel over the upper and lower surfaces of a 2-m-long flat plate at a velocity of 2 m/s. If the flat plate srface temperature is maintained at 80°C, de termine the local convection heat transfer coefficient at 1 m from the leading edge, the average convection heat transfer rate over the e ntire plate, and the total heat flux transfer to the plate. 11. 111. COo, T. Fig 3
BThe heat transfer from a 2-m-diameter sphere to a 25 °C air stream over a time interval of one hour is 3000 kJ. Estimate the surface temperature of the sphere if the heat transfer coefficient is 10 W/m²K.
i need the answer quickly
Air, at a free-stream temperature of 27 C and a pressure of 1 atm, flows over a long circular cylinder in crossflow. The cylinder has a diameter of 15.3 cm, and the air velocity is 2.5 m/s. The long cylinder is maintained at a constant temperature of 127 C. Find the heat transfer rate from the long cylinder per unit length due to forced convection.
The local atmospheric pressure in Denver, Colorado (elevation 1610 m), is 83.4 kPa Air at this pressure and 20°C flows with a velocity of 8 m/s over a 1.5 mx6 m flat plate whose temperature is 140°C as shown in Fig below. Determine the rate of heat transfer from the plate if the air flows parallel to the (a) 6-m-long side.
Air at a pressure of 1 atm. abs. and 50°C flows parallel to the top surface of a rectangular plate, 2 m x 9 m. Its temperature is maintained at 150°C. The air velocity is 8 m/s. If the critical Re no. is 106, determine the rate of heat transfer from the plate if the air flows parallel to (i) the 2 m long side (ii) the 9 m long side
Air is flowing in parallel over the upper surface of a flat plate with a length of 4m. The first half of the plate length, from the leading edge, has a constant surface temperature of 50 degrees Celsius. The second half of the plate length is subjected to a uniform heat flux of 86 W/m2. The air has a free stream velocity and temperature of 2 m/s and 10 degrees Celsius, respectively. Determine the local convection heat transfer coefficients at 1 m and 3 m from the leading edge. Evaluate the air properties at a film temperature of 30 degrees Celsius. Is the film temperature Tf=30 degrees Celsius applicable at x = 3 m?
Laminar flow normally persists on a smooth flat plate until a critical Reynolds number value is reached. However, the flow can be tripped to a turbulent state by adding roughness to the leading edge of the plate. For a particular situation, experimental results show that the local heat transfer coefficients for laminar and turbulent conditions are hx,lam = (1.74 W / m¹.5 · K ) x-0.5 and hx,turb= (3.98 W/m² 1.8 K ) x-0.2, respectively. Calculate the average heat transfer coefficients, in W/m².K for laminar and turbulent conditions for plates of length L = 0.1 m. ₁,Jam h₁.turb || = || = i i W/m².K W/m².K
Consider atmospheric air at 25 °C and a velocity of 25 m/s flowing over BOTH surfaces of a 1-m- long flat plate that is maintained at 125 °C. The width of the plate (into paper direction) is 1 m. Determine the rate of heat transfer if the critical Reynolds number is 5 × 105.
Mercury at 25°C flows over a 3-m-long and 2-m-wide flat plate maintained at 75°C with a velocity of 0.01 m/s. Determine the rate of heat transfer from the entire plate.