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Air at 0.8 atm and 22 °C flows across a 40 cm square plate with a...
Q. Air at 1 atm and 300 K blows across a 20-cm-square plate at 10 m/s....
Q. Air at 1 atm and 300 K blows across a 20-cm-square plate at 10 m/s. Heating does not begin until x=6 cm, after which the plate surface is subjected to constant heat flux of 1000 W/ m2. What is the maximum temperature that will be experienced by the plate surface?. Calculate the thickness of the hydrodynamic and the thermal boundary layers at the end of the plate.
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50 m/s. The plate is 300 cm long and is maintained at 60C. The width of the plate is 2 m. The critical Rec = 5 x 105 The properties are Conductivity k = 0.0263 W/mK, kinematic viscosity nu = v = 15.89 x 10-6 m²/s, Prandtl number is Pr=0.707 Density rho = p = 1.128 kg/m3 1. Determine the critical length Xc 2. Determine...
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...
During a cooling process of a stainless steel plate, water at 30°C flows over this plate...
During a cooling process of a stainless steel plate, water at 30°C flows over this plate at a velocity of 0.02 m/s. The stainless steel plate (k=19 W/mK) has 1.15 meter long in the flow direction) and the plate width is 0.7 meter. The plate has a uniform surface temperature of 70°C. Determine, 1. The average friction coefficient 2. The total drag force due to friction (N) 3. The average convection heat transfer 2. coefficient (W/m K) 4. The steady...
1.) A smooth glass plate is in a uniform free-stream where air flows over both sides of the plate. The plate is exposed to a constant surface heat flux. What air velocity must be used to remove 8...
1.) A smooth glass plate is in a uniform free-stream where air flows over both sides of the plate. The plate is exposed to a constant surface heat flux. What air velocity must be used to remove 850 W from the 1-m square plate? The plate surface is maintained at 65 C and the air stream is at 1 atm and 20° C Suppose the plate also radiates like a black surface to the surroundings at 20° C. What flow...
Air at 20 °C and 1 atm. flow over a flat plate with 35 m/s. The...
Air at 20 °C and 1 atm. flow over a flat plate with 35 m/s. The size of the plate is 75 cm by 75 cm and is maintained at 60 °C. Calculate: a) The heat transfer rate 40 cm from the leading edge of the plate. b) The heat transfer rate at the end of the plate (at x = L). c) The heat transfer rate from the entire plate. d) The heat transfer rate at the...
Air enters a 23-cm-diameter 13-m-long underwater duct at 53°C and 1 atm at a mean velocity...
Air enters a 23-cm-diameter 13-m-long underwater duct at 53°C and 1 atm at a mean velocity of 7 m/s, and is cooled by the water outside. If the average heat transfer coefficient is 85 W/m2 °C and the tube temperature is nearly equal to the water temperature of 5°C, determine the exit temperature of air and the rate of heat transfer. Use Table A-15 for the properties of air at the anticipated average temperature of 30°C. Answer in Watts. please...
Qi. A flat plate of width 1 m and length 0.2m is maintained at a temperature of 32°C. Ambient fluid at 22"C fBlows across the top of the plate in parallel flow. Determine the average heat tr...
Qi. A flat plate of width 1 m and length 0.2m is maintained at a temperature of 32°C. Ambient fluid at 22"C fBlows across the top of the plate in parallel flow. Determine the average heat transfer coefficient, the convection heat transfer rate from the top of the plate, and the drag force on the plate for the following: (a) The Buid is water flowing at a velocity of 0.5 m/s. o) Water is flowing at a velocity of 2.5...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1 m/s. This plate has a length L= 1 m and it is heated over its entire length; the plate temperature is constant Tp=100°C. The following data are given. For air: dynamic viscosity: mu = 1.9*10–5 kg/(m.s); density: rho = 1.05 kg/m3; conductivity k = 0.03 W/(m K); Specific heat Cp = 1.007 kJ/(kg K); Prandtl number Pr = 0.7 For laminar flow over a...
QUESTION 3 Air at atmospheric pressure flows with an inlet velocity of 1 m/s across a...
QUESTION 3 Air at atmospheric pressure flows with an inlet velocity of 1 m/s across a bank of tubes 10 rows deep in the direction of flow. The tubes have an outside diameter of 10 mm and are arranged in a staggered manner with a longitudinal pitch of Si-15 mm and a transverse pitch of ST- 15 mm. The surface temperature of the tubes is maintained at 77°C by hot water flowing in the tubes. Determine the mean heat transfer...
Q. Air at 1 atm and 300 K blows across a 20-cm-square plate at 10 m/s. Heating does not begin until x=6 cm, after which the plate surface is subjected to constant heat flux of 1000 W/ m2. What is the maximum temperature that will be experienced by the plate surface?. Calculate the thickness of the hydrodynamic and the thermal boundary layers at the end of the plate.
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50 m/s. The plate is 300 cm long and is maintained at 60C. The width of the plate is 2 m. The critical Rec = 5 x 105 The properties are Conductivity k = 0.0263 W/mK, kinematic viscosity nu = v = 15.89 x 10-6 m²/s, Prandtl number is Pr=0.707 Density rho = p = 1.128 kg/m3 1. Determine the critical length Xc 2. Determine...
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...
During a cooling process of a stainless steel plate, water at 30°C flows over this plate at a velocity of 0.02 m/s. The stainless steel plate (k=19 W/mK) has 1.15 meter long in the flow direction) and the plate width is 0.7 meter. The plate has a uniform surface temperature of 70°C. Determine, 1. The average friction coefficient 2. The total drag force due to friction (N) 3. The average convection heat transfer 2. coefficient (W/m K) 4. The steady...
1.) A smooth glass plate is in a uniform free-stream where air flows over both sides of the plate. The plate is exposed to a constant surface heat flux. What air velocity must be used to remove 850 W from the 1-m square plate? The plate surface is maintained at 65 C and the air stream is at 1 atm and 20° C Suppose the plate also radiates like a black surface to the surroundings at 20° C. What flow...
Qi. A flat plate of width 1 m and length 0.2m is maintained at a temperature of 32°C. Ambient fluid at 22"C fBlows across the top of the plate in parallel flow. Determine the average heat transfer coefficient, the convection heat transfer rate from the top of the plate, and the drag force on the plate for the following: (a) The Buid is water flowing at a velocity of 0.5 m/s. o) Water is flowing at a velocity of 2.5...
QUESTION 3 Air at atmospheric pressure flows with an inlet velocity of 1 m/s across a bank of tubes 10 rows deep in the direction of flow. The tubes have an outside diameter of 10 mm and are arranged in a staggered manner with a longitudinal pitch of Si-15 mm and a transverse pitch of ST- 15 mm. The surface temperature of the tubes is maintained at 77°C by hot water flowing in the tubes. Determine the mean heat transfer...
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