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7.34 Consider the following fluids, each with a velocity of V- 3 m/s and a temperature of T 20°C,...
3. Consider a cylinder of 20 mm in diameter (D) and 100 mm in length (L)...
3. Consider a cylinder of 20 mm in diameter (D) and 100 mm in length (L) that is installed in a duct. Air moves in cross flow over the side surface of the cylinder at a temperature (To) and velocity (V) of 33.7 C and 30 m/s, respectively. If the average cylinder surface temperature (T) is maintained at 120°C, what is the required power generation of the cylinder? Note: (1) Air properties can be found from Table A.4 in the...
T,= 75 °C T= 25°C V = 10 m/s Air 3. (25 pts) Atmospheric air at...
T,= 75 °C T= 25°C V = 10 m/s Air 3. (25 pts) Atmospheric air at 25 °C flows across a long pipe at a uniform velocity of 10 m/s. The pipe has an external diameter of 120 mm and its surface temperature is maintained at 75 °C. Determine the rate of heat transfer per unit length of the pipe and the drag force exerted per unit length of the pipe. Hint: You can use the information on the next...
Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model...
Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid The air velocity is to be 2 m/s What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 1.6 x 10-5 m2/s, Kinematic viscosity of oil = 1.2 x 10-3 m2/s 0.45 mm 0.8 mm 4.5...
Question 4 Oil flows with a velocity of 4 m/s through a 30 mm diameter tube....
Question 4 Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid. The air velocity is to be 2 m/s. What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 16 x 105 m2/s, Kinematic viscosity of oil 1,2 x 103 m2/s 0.45 mm 0.8 mm...
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...
Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 30 m/s, while the...
Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 30 m/s, while the surface of the sphere is maintained at 75°C. What is the rate of heat transfer from the sphere?
Problem 7.054 Air at 25°C flows over a 9-mm-diameter sphere with a velocity of 20 m/s,...
Problem 7.054 Air at 25°C flows over a 9-mm-diameter sphere with a velocity of 20 m/s, while the surface of the sphere is maintained at 75°C. What is the rate of heat transfer from the sphere? tPatheaticalsnctions
Consider atmospheric air at 20°C and a velocity of 30 m/s flowing over both surfaces of...
Consider atmospheric air at 20°C and a velocity of 30 m/s flowing over both surfaces of a 1-m-long flat plate that is maintained at 130°C. Determine the rate of heat transfer per unit width from the plate for values of the critical Reynolds number corresponding to 105, 5 × 105, and 106
3. Consider the following fluids at a film temperature of 300 K in parallel flow over...
3. Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with velocity of 1 m/s: atmospheric air and mercury. a. For each fluid, estimate the velocity and thermal boundary layer thicknesses at a distance of 40 mm from the leading edge. (4 pts for each boundary layer thickness determination. Total 16 pts) At what distance from the leading edge, do the boundary layers of air and mercury transition to turbulence? (5...
3. Consider a cylinder of 20 mm in diameter (D) and 100 mm in length (L) that is installed in a duct. Air moves in cross flow over the side surface of the cylinder at a temperature (To) and velocity (V) of 33.7 C and 30 m/s, respectively. If the average cylinder surface temperature (T) is maintained at 120°C, what is the required power generation of the cylinder? Note: (1) Air properties can be found from Table A.4 in the...
T,= 75 °C T= 25°C V = 10 m/s Air 3. (25 pts) Atmospheric air at 25 °C flows across a long pipe at a uniform velocity of 10 m/s. The pipe has an external diameter of 120 mm and its surface temperature is maintained at 75 °C. Determine the rate of heat transfer per unit length of the pipe and the drag force exerted per unit length of the pipe. Hint: You can use the information on the next...
Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid The air velocity is to be 2 m/s What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 1.6 x 10-5 m2/s, Kinematic viscosity of oil = 1.2 x 10-3 m2/s 0.45 mm 0.8 mm 4.5...
Question 4 Oil flows with a velocity of 4 m/s through a 30 mm diameter tube. A model of this system is to be developed using standard air as the model fluid. The air velocity is to be 2 m/s. What tube diameter is required for the model if dynamic similarity is to be maintained between model and prototype? Kinematic viscosity of air = 16 x 105 m2/s, Kinematic viscosity of oil 1,2 x 103 m2/s 0.45 mm 0.8 mm...
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...
Problem 7.054 Air at 25°C flows over a 9-mm-diameter sphere with a velocity of 20 m/s, while the surface of the sphere is maintained at 75°C. What is the rate of heat transfer from the sphere? tPatheaticalsnctions
3. Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with velocity of 1 m/s: atmospheric air and mercury. a. For each fluid, estimate the velocity and thermal boundary layer thicknesses at a distance of 40 mm from the leading edge. (4 pts for each boundary layer thickness determination. Total 16 pts) At what distance from the leading edge, do the boundary layers of air and mercury transition to turbulence? (5...
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