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Problem 9.013 Your answer is partially correct. Try again. Consider a vertical plate of dimension 0.25...
Your answer is incorrect. Try again. A square aluminum plate 5 mm thick and 160 mm on a side is h...
Your answer is incorrect. Try again. A square aluminum plate 5 mm thick and 160 mm on a side is heated while vertically suspended in quiescent air at 40°C. Determine the average heat transfer coefficient for the plate when its temperature is 20°C by two methods: (a) using results from the similarity solution to the boundary layer equations, and (b) using results from an empirical correlation. Evaluate properties of air at the film temperature (a) Determine the average heat transfer...
1. Consider an opaque, horizontal square plate (Im by 1m) with an electrical heater on its backside. The front side is exposed to ambient quiescent air that is at 20° C, solar irradiation (from...
1. Consider an opaque, horizontal square plate (Im by 1m) with an electrical heater on its backside. The front side is exposed to ambient quiescent air that is at 20° C, solar irradiation (from sun at 5800° K) of 600 W/m2, and an effective sky temperature of -40° C. The plate surface temperature is kept at Ts 60 C (at steady state condition). Calculate natural convection heat transfer coefficient from the plate. (10 points) What is the electrical power (W/m2)...
Advanced thermofulid machanics 3. Heat is generated at zoW in a horizontal plate that is 16cm-ionga...
Advanced thermofulid machanics
3. Heat is generated at zoW in a horizontal plate that is 16cm-ionga Qcom Air Ind T,-20°C L-16 cm W-20cm and 2ocm-wide, that is exposed the surrounding environment. The ambient air is at To-20°C is not moving and the surrounding surface is taken as the sky which has a temperature of Tarr-1700 The generated heat from the horizontal plate therefore loses heat through natural convection and radiation. The temperature of the plate when steady operating conditions are...
1. A vertical glass plate covers a fireplace. The plate is at a temperature of 232...
1. A vertical glass plate covers a fireplace. The plate is at a temperature of 232 C and is located in a room at 23 °C. Use an average film temperature of 400 K when finding air properties. a) Find the Raleigh number for natural (free) convection from the plate. b) Find an average convection coefficient for the plate. Use the Churchill and Chu relation. e) Find the heat loss rate to the room. W Bricks Haight L=0.71 • Plate...
Chapter 27, Problem 54 GO Your answer is partially correct. Try again. A soap film (n...
Chapter 27, Problem 54 GO Your answer is partially correct. Try again. A soap film (n = 1.33) is 464 nm thick and lies on a glass plate (n = 1.52). Sunlight, whose wavelengths (in vacuum) extend from 380 to 750 nm, travels through the air and strikes the film perpendicularly. For which wavelength(s) in this range does destructive interference cause the film to look dark in reflected light? [822.826 Avacuum nm the tolerance is +/-2% Click if you would...
8) Air flows over a flat plate at a velocity of 20 m/s and a temperature...
8) Air flows over a flat plate at a velocity of 20 m/s and a temperature of 20C. The surface temperature of the plate is 134C, and the length of the plate in the direction of flow is 1.5 m. Properties of air may be taken as A-0.030 W/m-C, Pr-0.700, and a/p 2.092E-5 m/s (5% ) What is the location from the leading edge, X, where the flow becomes turbulent Re (20)15 a l Ve30s T20 T LaLS 523 m...
Start by checking your Reynolds number (Re) at the end of the plate, where it will...
Start by checking your Reynolds number (Re) at the end of the
plate, where it will be at a maximum. This will determine if your
boundary layer is simply laminar along the length of the plate or
if it becomes turbulent (the "mixed BL" condition). Once you know
the conditions of the flow, you can solve for the velocity BL
thickness directly with an equation from the list of external flow
correlations (posted). Your properties should be looked up at...
Chapter 14, Problem 002 Your answer is partially correct. Try again. A partially evacuated airtight container...
Chapter 14, Problem 002 Your answer is partially correct. Try again. A partially evacuated airtight container has a tight-fitting lid of surface area 78.0 cm2 and negligible mass. If the force required to remove the lid is 314 N and the atmospheric pressure is 1.00 x 105 Pa, what is the air pressure in the container before it is opened? 1-1 Numbe140256 UnitsT N/m 2 or Pa
8. Consider two square parallel vertical Plate 2 (on the right) is insulated and its tem...
8. Consider two square parallel vertical Plate 2 (on the right) is insulated and its tem are surrounded by its temperature is T. = 300 K. parallel vertical plates of 1 m side. Plate 1 (on the left) is kept at T. - 700 K and is insulated and its temperature is T2 = 300 K. The plates are placed 0.5 m apart and 3) with walls at Tw=270 K. The air in the room is stagnant and a. Find...
Heat Transfer problem, ch9 Will give instant thumbs up! Problem 14: Also, after going over example...
Heat Transfer problem, ch9
Will give instant thumbs up!
Problem 14: Also, after going over example problem 9-2, determine the heat transfer by natural convection for the hot plate facing down with 0 = 30°. Cooling of a Plate in Different Orientations Consider a 0.6-m x 0.6-m thin square plate in a room at 30°C. One side of the plac is maintained at a temperature of 90°C, while the other side is insulated, as shown in Fig. 9-18. Determine the...
Your answer is incorrect. Try again. A square aluminum plate 5 mm thick and 160 mm on a side is heated while vertically suspended in quiescent air at 40°C. Determine the average heat transfer coefficient for the plate when its temperature is 20°C by two methods: (a) using results from the similarity solution to the boundary layer equations, and (b) using results from an empirical correlation. Evaluate properties of air at the film temperature (a) Determine the average heat transfer...
1. Consider an opaque, horizontal square plate (Im by 1m) with an electrical heater on its backside. The front side is exposed to ambient quiescent air that is at 20° C, solar irradiation (from sun at 5800° K) of 600 W/m2, and an effective sky temperature of -40° C. The plate surface temperature is kept at Ts 60 C (at steady state condition). Calculate natural convection heat transfer coefficient from the plate. (10 points) What is the electrical power (W/m2)...
Advanced thermofulid machanics
3. Heat is generated at zoW in a horizontal plate that is 16cm-ionga Qcom Air Ind T,-20°C L-16 cm W-20cm and 2ocm-wide, that is exposed the surrounding environment. The ambient air is at To-20°C is not moving and the surrounding surface is taken as the sky which has a temperature of Tarr-1700 The generated heat from the horizontal plate therefore loses heat through natural convection and radiation. The temperature of the plate when steady operating conditions are...
1. A vertical glass plate covers a fireplace. The plate is at a temperature of 232 C and is located in a room at 23 °C. Use an average film temperature of 400 K when finding air properties. a) Find the Raleigh number for natural (free) convection from the plate. b) Find an average convection coefficient for the plate. Use the Churchill and Chu relation. e) Find the heat loss rate to the room. W Bricks Haight L=0.71 • Plate...
Chapter 27, Problem 54 GO Your answer is partially correct. Try again. A soap film (n = 1.33) is 464 nm thick and lies on a glass plate (n = 1.52). Sunlight, whose wavelengths (in vacuum) extend from 380 to 750 nm, travels through the air and strikes the film perpendicularly. For which wavelength(s) in this range does destructive interference cause the film to look dark in reflected light? [822.826 Avacuum nm the tolerance is +/-2% Click if you would...
8) Air flows over a flat plate at a velocity of 20 m/s and a temperature of 20C. The surface temperature of the plate is 134C, and the length of the plate in the direction of flow is 1.5 m. Properties of air may be taken as A-0.030 W/m-C, Pr-0.700, and a/p 2.092E-5 m/s (5% ) What is the location from the leading edge, X, where the flow becomes turbulent Re (20)15 a l Ve30s T20 T LaLS 523 m...
Start by checking your Reynolds number (Re) at the end of the
plate, where it will be at a maximum. This will determine if your
boundary layer is simply laminar along the length of the plate or
if it becomes turbulent (the "mixed BL" condition). Once you know
the conditions of the flow, you can solve for the velocity BL
thickness directly with an equation from the list of external flow
correlations (posted). Your properties should be looked up at...
Chapter 14, Problem 002 Your answer is partially correct. Try again. A partially evacuated airtight container has a tight-fitting lid of surface area 78.0 cm2 and negligible mass. If the force required to remove the lid is 314 N and the atmospheric pressure is 1.00 x 105 Pa, what is the air pressure in the container before it is opened? 1-1 Numbe140256 UnitsT N/m 2 or Pa
8. Consider two square parallel vertical Plate 2 (on the right) is insulated and its tem are surrounded by its temperature is T. = 300 K. parallel vertical plates of 1 m side. Plate 1 (on the left) is kept at T. - 700 K and is insulated and its temperature is T2 = 300 K. The plates are placed 0.5 m apart and 3) with walls at Tw=270 K. The air in the room is stagnant and a. Find...
Heat Transfer problem, ch9
Will give instant thumbs up!
Problem 14: Also, after going over example problem 9-2, determine the heat transfer by natural convection for the hot plate facing down with 0 = 30°. Cooling of a Plate in Different Orientations Consider a 0.6-m x 0.6-m thin square plate in a room at 30°C. One side of the plac is maintained at a temperature of 90°C, while the other side is insulated, as shown in Fig. 9-18. Determine the...
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