Question

Consider atmospheric air at 25oC and a velocity of 20 m/s flowing over both surfaces of...

Consider atmospheric air at 25oC and a velocity of 20 m/s flowing over both surfaces of a 1-m-long flat plate that is maintained at 100oC. Determine the rate of heat transfer per unit width from the plate for
5 values of the critical Reynolds number corresponding to 5x10 .

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Determine the heat transfer rate per unit width for a 0.9-m long plate with a surface...
Determine the heat transfer rate per unit width for a 0.9-m long plate with a surface temperature of 125°C for critical Reynolds numbers corresponding to (A) 105, (B) 5 x 105, and (C) 106. Air flows over the plate at 25°C with a velocity of 25m/s. Calculate the Reynolds number. Critical Reynolds Number A Critical Reynolds Number B Critical Reynolds Number C
Liquid water at velocity of 2 m/s and temperature of 15 °C flows over a flat...
Liquid water at velocity of 2 m/s and temperature of 15 °C flows over a flat plate. The plate has a width of 1 m, length of 0.4 m and surface temperature of 37 °C. Determine: (a) the average heat transfer coefficient. (b) the convection heat transfer rate from the top surfacc of the platc.
Air at freestream velocity U∞=16 ms, and free steam temperature      T∞=50℃ is flowing over a plate...
Air at freestream velocity U∞=16 ms, and free steam temperature      T∞=50℃ is flowing over a plate surface that is at temperature Ts=100℃. The velocity and thermal boundary layers developing on the surface have been shown in the figure. Also shown are the tangents to the velocity and temperature profiles at the surface y=0. If the density of air is ρ∞=1.1 kgm3, viscosity μ=1.963×10-5kgm∙s, and thermal conductivity k=0.0274Wm∙K then, calculate (a)        the wall shear stress, τw (b)       coefficient of skin friction,...
Air at free-stream velocity of 9 m/s flows over a thin flat plate of length 3...
Air at free-stream velocity of 9 m/s flows over a thin flat plate of length 3 m and width 1.5 m. A laminar boundary layer develops from the leading edge of the flat plate. At Rex = 500 000, the boundary layer becomes a turbulent boundary layer where x is the distance from the leading edge. ρair = 1.2 kg/m3 , μair = 1.8 x 10-5 kg/m.s (a) Estimate the length of the laminar boundary layer. (b) Estimate the drag...
Dry air at 35°C and a velocity of 20 m/s flows over a wetted plate of...
Dry air at 35°C and a velocity of 20 m/s flows over a wetted plate of length 500 mm and width 150 mm. An embedded electrical heater supplies power to maintain the plate surface temperature at 20°C. What is the evaporation rate (kg/h) of water from the plate? What electrical power is required to maintain steady-state conditions? Determine the evaporation rate of water from the plate, in kg/h Determine the electrical power is required to maintain steady-state conditions, in W
Problem 4: Air at 20°C and 1 atm flows over a horizontal flat plate at 1...
Problem 4: Air at 20°C and 1 atm flows over a horizontal flat plate at 1 m/s. The plate is 20m by 1m and is maintained at 60°C. If the flow is in the direction of smaller side, calculate the power needed to maintain the surface temperature. Also repeat problem 4 for a case where air velocity is zero.
Air at a pressure of 1 atm and a temperature of 15C is in parallel flow...
Air at a pressure of 1 atm and a temperature of 15C is in parallel flow at a velocity of 10 m/s over a 3-m long flat plate that is heated to a uniform temperature of 140 C. (a) What is the average heat transfer coefficient and heat transfer rate for the plate? (b) What is the local heat transfer coefficient and heat flux at the midpoint of the plate? (c) Plot the variation of the heat flux with distance...
Airflow (velocity of u∞=15m/s, the temperature of T∞= 15°C) sweep over a flat surface with an...
Airflow (velocity of u∞=15m/s, the temperature of T∞= 15°C) sweep over a flat surface with an area of 0.25 m2 and a temperature of 140 °C. The airflow induces a drag force of 0.25 N on the surface. What is the heat transfer rate across the surface? You can use Table A.4 in the lecture slides or other available data to evaluate air properties (Hint: Use Modified Reynolds analogy) (10 points)
10. Air is to be heated by passing it over a bank of 2.8-m-long tubes inside...
10. Air is to be heated by passing it over a bank of 2.8-m-long tubes inside which steam is condensing at 90ºC. Air approaches the tube bank in the normal direction at 20ºC and 1 atm with a mean velocity of 5.2 m/s. The outer diameter of the tubes is 1.6 cm, and the tubes are arranged staggered with longitudinal and transverse pitches of SL = ST= 4 cm. There are 30 rows in the flow direction with 10 tubes...
This is a heat transfer course, please explain and show work neatly, and please do not...
This is a heat transfer course, please explain and show work neatly, and please do not copy from any other solutions because they are incorrect. Thank you so much in advance Consider atmospheric air at a velocity of V = 20 m/s and a temperature of T= 20C, in cross flow over 10 mm square tube at 45 degrees, maintained at 50C. Sketch Assumptions Calculate the air properties (show the interpolation steps) Re = ? Nu = ? (reference the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT