Water at 25°C flows over a flat plate with a free flow velocity of 2 m/s. The uniform plate surface temperature is 86°C. The thickness of the thermal boundary layer at a distance of 8cm from the front rim. The heat flux at that location
Q: Air at 400C flows with a velocity of 7 m/s over a 5m long and 4m wilde surface of a flat plate whose…
A: Given data: Air temperature, T = 40°C Velocity, V = 7 m/s Prandtl number, pr = 0.7255 Thermal…
Q: 5) A long aluminum wire of diameter 3 mm is extruded at a temperature of 370°C. The wire is…
A:
Q: Air at 25 ° C blows over the hot steel plate whose surface temperature is maintained at 150 ° C. The…
A: T1=Hot steel plate whose surface temperature=150T∞=Temperature of air=25°Ch=Convective heat transfer…
Q: A black 20-by-20-cm plate has air forced over it at a velocity of 2 m/s and a temperature of 0◦C.…
A: Given: The area of plate, A = 20x20 cm The velocity of air, v = 2 m/s The temperature of air, Ta =…
Q: 4: Hot methane exhaust gas at 1 atm is being cooled by flat plates. The gas at 150°C flows parallel…
A: Given Pressure = 1 atm Plate length = 2.5 m Velocity =2.5 m/s Surface temperature = 50o C Gas…
Q: A tube bank consists of 300 tubes at a distance of 6 cm between the centerlines of any two adjacent…
A:
Q: Air at 25 ° C blows over the hot steel plate whose surface temperature is maintained at 150 ° C. The…
A: Write the given data with suitable variables: T∞=25 °CTs=150 °Ch=40 W/m2-°Ck=45 W/m-°CA=50 cm×40…
Q: Engine oil at 100°C and a velocity of 0.15 m/s flows over both surfaces of a 1.1-m-long flat plate…
A: Given: The temperature of engine oil, T = 100 C The speed of engine oil, v = 0.15 m/s The length of…
Q: Air at 350C flows across a cylinder of 50 mm diameter at a velocity of 50 m/s. The cylinder surface…
A:
Q: Determine: (a) The velocity and thermal boundary layer thicknesses at the trailing edge. (b) The…
A:
Q: Engine oil at 100°C and a velocity of 0.20 m/s flows over both surfaces of a 0.8-m-long flat plate…
A: Given that: T = 100 oC Surface temperature = Ts = 20 oC Velocity = V = 0.2 m/s L = length = 0.8 m It…
Q: Air at 20 °C flows with a velocity of 10 m/s along a 4 m flat plate which is maintained at uniform…
A:
Q: Q1. A 6-mm-diameter electrical transmission line carries an electric current of 50 A and has a…
A: Given data: The diameter of the electrical transmission is d=6 mm=0.006 m The electric current in…
Q: Four power transistors, each dissipating 12 W, are mounted on a thin vertical aluminum plate (k =…
A: The properties of air at 40 degrees Celsius and 1 atm pressure are: The Reynolds number of the flow…
Q: A heating system is to be designed to keep the wings of an aircraft cruising at a velocity of 900…
A:
Q: A 6-cm diameter pipe is used to deliver hot water to a residence. A 8-m-long horizontal section of…
A: Given The mass flow rate of water, m = 0.015 kg/s
Q: The forming section of a plastics plant puts out a continuous sheet of plastic that is 1.2 m wide…
A:
Q: A 8-cm diameter pipe is used to deliver hot water to a residence. A 6-m-long horizontal section of…
A: Given:L=6 md=0.08 mTa=20°CTs=72°Cmw=0.03 Kg/sTwi=86°Ck=0.027 W/m°Cv=17.5*10-6 m2/sα=25*10-6…
Q: Air at 2 atm and 200 c° is heated as it flow through a tube with diameter of 2.54 cm at velocity of…
A:
Q: Air is flowing in parallel over the upper surface of a flat plate with a length of 4 m. The first…
A: The value of kinematic viscosity, v = 1.608×10-5 m2s Thermal conductivity, k = 0.02588 Wm·K Prantl…
Q: Water at a temperature of 10°C flows at a velocity of 3 m/s across a plate maintained at a uniform…
A: Solution is given below.
Q: Exhaust gases at 1 atm and 300°C are used to preheat water in an industrial facility by passing them…
A: Given:- k = 0.04104 W/m·K ρ = 0.6746 kg/m3 cp =1.033 kJ/kg·K Pr = 0.6946μ = 2.76…
Q: Water at 43.3°C flows over a large square plate at a velocity of 20 cm/s. The plate is 2 m long (in…
A:
Q: A 5-m-long strip of sheet metal is being transported on a conveyor at a velocity of 5 m/s, while the…
A:
Q: During a cold winter day, wind at 55 km/h is blowing parallel to a 4-m-high and 10-m-long wall of a…
A:
Q: Engine oil at 100°C and a velocity of 0.05 m/s flows over both surfaces of a 1.1-m-long flat plate…
A:
Q: Air at 300 degrees Celsius flows over a plate of dimension 0.5 m by 0.25 m. If the convection heat…
A:
Q: Q9) Consider a 50 cm diameter and 95 cm long hot water tank. The tank is placed on the roof of a…
A:
Q: The lower surface of a flat Teflon plate (k=0.35 W/(m.K),ρ=2200 kg/m3 and cp=1500 J/(kg.K) with 2 m…
A:
Q: Over the outside part of the room window, the wind is blowing with a speed of 10 m/sec. Due to this…
A:
Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…
A: Given: The temperature of fluid, T = 300 K The speed of fluid, v = 1 m/s The distance from leading…
Q: Air at 20°C flows over a flat plate having a uniform heat flux of 800 W/m². The flow velocity is…
A: given data temperature of air = 20°C speed or air = 4 m/s heat flux = 800w/m^2 length of plate =…
Q: A long aluminum wire of diameter 3 mm is extruded at a temperature of 280°C. The wire is subjected…
A: The mean film temperature is The properties of air at mean film temperature are: The Reynolds…
Q: Flue gases from an incinerator are released to atmosphere using a stack that is 0.6 m in diameter…
A: Given : The diameter of stack = 0.6 m The height of the stack = 10 m Surface temperature of the…
Q: Air is flowing in parallel over the upper surface of a flat plate with a length of 4 m. The first…
A: Write the given data with suitable variables: L=4 mT=50 °Cv=0.5 m/sTa=10 °C
Q: Air at 25 ° C blows over the hot steel plate whose surface temperature is maintained at 150 ° C. The…
A: Given data: The temperature of the air is T∞=25°C The surface temperature of the plate is Ts=150°C…
Q: Q1 a) Engine oil at 100°C and a velocity of 0.1 m/s flows over both surfaces of a 1-m long flat…
A: Given: Length of the plate→L=1 m Temperature of the plate→Ts=20°C=293 K Temperature of the engine…
Q: A 6-mm-diameter electrical transmission line carries an electric current of 50 A and has a…
A: Given data as per question Current = 50 A Resistance = 0.002 Ω/m Velocity of air = 40 km/hr = 11.11…
Q: Air is flowing in parallel over the upper surface of a flat plate with a length of 4 m. The first…
A: The velocity of free stream is V=0.5 m/s. The temperature of air is T∞=100C. The kinematic viscosity…
Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…
A: Given data: Film Temperature = Tf = 300 K Fluid velocity = u = 1 m/s Fluids are : Air, Water, Engine…
Q: Fins, or extended surfaces, commonly are used in a variety of engineering applications to enhance…
A: Given: T-Tambient=(Tbase-Tambient)e-mx k=168 W/m.Kh=12 W/m2Ka= 0.05 mb=0.01…
Q: Engine oil at 100°C and a velocity of 0.15 m/s flows over both surfaces of a 1.2-m-long flat plate…
A:
Q: Air at 25 ° C blows over the hot steel plate whose surface temperature is maintained at 150 ° C. The…
A: Given, Air temperature, T∞=25 °C Steel plate surface temperature, Ts=150 °C Area of the plate,…
Q: Consider a 50-cm-diameter and 95-cm-long hot water tank. The tank is placed on the roof of a house.…
A:
Q: 2.0 Engine oil at 100°C and a velocity of 0.25 m/s flows over both surfaces of a 0.8-m-long flat…
A:
Q: Required information Hot engine oil at 150°C is flowing in parallel over a flat plate at a velocity…
A:
Q: Engine oil at 100°C and a velocity of 0.15 m/s flows over both surfaces of a 1.1-m-long flat plate…
A: When an object moves in a linear direction, then the distance travelled by the object in a unit time…
Q: 0.5 W of heat passes from the bottom of a silicon chip (k = 130 W/m-K) and then dissipated to the…
A:
Water at 25°C flows over a flat plate with a free flow velocity of 2 m/s. The uniform plate surface temperature is 86°C.
- The thickness of the thermal boundary layer at a distance of 8cm from the front rim.
- The heat flux at that location
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
- Determine 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.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.An electrical transmission line of 1.2-cm diameter carries a current of 200 amps and has a resistance of 310-4 ohm per meter of length. If the air around this line is at v, determine the surface temperature on a windy day, assuming a wind blows across the line at 33 km/h.
- Air 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.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.Airstream at 1 atm flows, with a velocity of 15 m/s, in parallel over a 3-m-long flat plate where there is an unheated starting length of 1 m. The airstream has a temperature of 20°C and the heated section of the flat plate is maintained at a constant temperature of 80°C. Determine (a) the local convection heat transfer coefficient at the trailing edge and (b) the average convection heat transfer coefficient for the heated section.
- Air at 20oC and 1 atm flows over a flat plate at 35 m/s. The plate is 75 cm long and 100 cm depth and is maintained at 60oC. Calculate (a) velocity boundary layer thickness at the leading edge, (b) thermal boundary layer thickness at the distance of 10 cm from the leading edge, and (c) thermal boundary layer thickness at the trailing edge.Water at 60 ⁰C and velocity of 2 cm/s flows over a 5 m long flat plate which is maintained at a temperature of 20 ⁰C. Determine the total drag force and rate of heat transfer per unit width of the plateQuestion No. 3: During a cold winter day, wind at 55 km/h is blowing 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 is12°C, determine the rate of heat loss from that wall by convection. What would your answer be if the wind velocity was doubled
- 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?The upper surface of a metal plate is being cooled with parallel air flow while its lower surface is subjected to a uniform heat flux of 810 W/m2. The air has a free stream velocity and temperature of 2.5 m/s and 15°C, respectively. Determine the surface temperature of the plate at x = 1.5 m from the leading edge. Hint: The surface temperature has to be found iteratively. Start the iteration process with an initial guess of 45°C for the surface temperature.2.0 Engine oil at 100°C and a velocity of 0.25 m/s flows over both surfaces of a 0.8-m-long flat plate maintained at 20°C.Determine:(a) The velocity and thermal boundary layer thicknesses at the trailing edge.(b) The local heat flux and surface shear stress at the trailing edge.(c) The total drag force and heat transfer per unit width of the plate.