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4. A valve with diameter of 60 cm is intended for applications with water (kinematic viscosity...
It is Fluid Class! 8. The minor loss coefficients K = Ap/(PV/2) for a 600-mm-diameter valve...
It is Fluid Class!
8. The minor loss coefficients K = Ap/(PV/2) for a 600-mm-diameter valve are to be determined from tests on a geometrically similar 300-mm-diameter valve using atmospheric air at 80°F (kinematic viscosity v = 1.57.10 mº/s). What range of volumetric flow rates of air is required to model flows of water at 70°F (v=9.96-10-mº/s) with mean velocities between 1 m/s and 2.5 m/s? Viscous forces are important.
Q3. Drag measurements were taken for a 5 cm diameter sphere in water at 20°C to...
Q3. Drag measurements were taken for a 5 cm diameter sphere in water at 20°C to predict the drag force of a 1 m diameter balloon rising in air with standard temperature and pressure. Given kinematic viscosity of water (v) = 10 X 106 m²/s and kinematic viscosity of air (v) = 1.46 X 10-5 m2/s. 1. Perform the Buckingham Pi theorem to generate a relationship for Fo as a function of the independent variables. Assume the drag Fo is...
Water, with density of 1000 kg/m3 and kinematic viscosity of 1.0 x 10- m2/s, is pumped through a ...
Water, with density of 1000 kg/m3 and kinematic viscosity of 1.0 x 10- m2/s, is pumped through a total length of 60 m of pipe from a lower reservoir to a higher reservoir. The inner diameter of the pipe is 30 cm. Both reservoirs are open to the atmosphere, and the water surface of the higher reservoir is 10 m above that of the lower reservoir. The entrance from the lower reservoir to the pipe is sharp-edged, and along the...
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...
Water flows at speed of 6 m/s through a horizontal pipe of diameter 3.5 cm. The...
Water flows at speed of 6 m/s through a horizontal pipe of
diameter 3.5 cm. The gauge pressure P1 of the water in the pipe is
1.7 atm. A short segment of the pipe is constricted to a smaller
diameter of 2.4 cm .
What is the gauge pressure of the water flowing through the
constricted segment? Atmospheric pressure is 1.013 × 10^5 Pa. The
density of water is 1000 kg/m^3 . The viscosity of water is
negligible. Answer in...
Consider the turbulent flow of air, density 1.2 kg/m3 and kinematic viscosity 1.5x10-5m2/s, through a channel bounded by two infinitely wide parallel plates 0.2 m apart. At a certain downstream locati...
Consider the turbulent flow of air, density 1.2 kg/m3 and kinematic viscosity 1.5x10-5m2/s, through a channel bounded by two infinitely wide parallel plates 0.2 m apart. At a certain downstream location where fully-developed conditions apply, the wall shear stress is measured to be 0.027 N/m2. a. Determine the streamwise mean velocities at locations 0.25 mm and 1 cm from the wall. b. At which of these two locations do you expect to find the larger Reynolds shear stress.
use table A-15 kinematic viscosity 6. Consider a 2-m long smooth cylindrical pipe of 5 cm...
use table A-15 kinematic viscosity
6. Consider a 2-m long smooth cylindrical pipe of 5 cm internal diameter, that is maintained at a constant surface temperature. Air flows through the tube at 0.5 m/s. Air enters the pipe at 20°C and leaves it at 60°C. Determine: (a) Is the flow laminar or turbulent? (b) Is the flow fully developed? (c) What Nu number correlation will you use to find h? Find Nu. (d) Find the convection heat transfer coefficient (h)...
A piston pushes 20 ∘C water through a horizontal tube of 0.23 −cm radius and 2.7...
A piston pushes 20 ∘C water through a horizontal tube of 0.23 −cm radius and 2.7 m length. One end of the tube is open and at atmospheric pressure. Determine the force needed to push the piston so that the flow rate is 105 cm3/s . The viscosity of water at this temperature is 1.0 ×10−3 N⋅s/m2. Express your answer with the appropriate units. Repeat the problem using SAE 10 oil instead of water. The viscosity of oil is 0.20...
A pressurized tank of water has a 9-cm-diameter orifice at the bottom, where water discharges to...
A pressurized tank of water has a 9-cm-diameter orifice at the bottom, where water discharges to the atmosphere. The water level is 2.5 m above the outlet. The tank air pressure above the water level is 250 kPa (absolute), while the atmospheric pressure is 100 kPa. Neglecting frictional effects, determine the initial discharge rate of water from the tank. -Air 250 kPa 2.5 m d cm The initial discharge rate of water from the tank is determined to be [...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water pipe passes through a large room whose temperature is To =15°C. The pipe is insulated with an insulating material of conductivity k=0.01 W/m-°C and 1 cm thick. If the inner surface temperature of the pipe is 95 °C (at r2) and the pipe is exposed to a cross wind of 6.0 m/s, determine the rate of heat loss from the pipe (neglect radiation). Thermal...
It is Fluid Class!
8. The minor loss coefficients K = Ap/(PV/2) for a 600-mm-diameter valve are to be determined from tests on a geometrically similar 300-mm-diameter valve using atmospheric air at 80°F (kinematic viscosity v = 1.57.10 mº/s). What range of volumetric flow rates of air is required to model flows of water at 70°F (v=9.96-10-mº/s) with mean velocities between 1 m/s and 2.5 m/s? Viscous forces are important.
Q3. Drag measurements were taken for a 5 cm diameter sphere in water at 20°C to predict the drag force of a 1 m diameter balloon rising in air with standard temperature and pressure. Given kinematic viscosity of water (v) = 10 X 106 m²/s and kinematic viscosity of air (v) = 1.46 X 10-5 m2/s. 1. Perform the Buckingham Pi theorem to generate a relationship for Fo as a function of the independent variables. Assume the drag Fo is...
Water, with density of 1000 kg/m3 and kinematic viscosity of 1.0 x 10- m2/s, is pumped through a total length of 60 m of pipe from a lower reservoir to a higher reservoir. The inner diameter of the pipe is 30 cm. Both reservoirs are open to the atmosphere, and the water surface of the higher reservoir is 10 m above that of the lower reservoir. The entrance from the lower reservoir to the pipe is sharp-edged, and along the...
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...
Water flows at speed of 6 m/s through a horizontal pipe of
diameter 3.5 cm. The gauge pressure P1 of the water in the pipe is
1.7 atm. A short segment of the pipe is constricted to a smaller
diameter of 2.4 cm .
What is the gauge pressure of the water flowing through the
constricted segment? Atmospheric pressure is 1.013 × 10^5 Pa. The
density of water is 1000 kg/m^3 . The viscosity of water is
negligible. Answer in...
use table A-15 kinematic viscosity
6. Consider a 2-m long smooth cylindrical pipe of 5 cm internal diameter, that is maintained at a constant surface temperature. Air flows through the tube at 0.5 m/s. Air enters the pipe at 20°C and leaves it at 60°C. Determine: (a) Is the flow laminar or turbulent? (b) Is the flow fully developed? (c) What Nu number correlation will you use to find h? Find Nu. (d) Find the convection heat transfer coefficient (h)...
A pressurized tank of water has a 9-cm-diameter orifice at the bottom, where water discharges to the atmosphere. The water level is 2.5 m above the outlet. The tank air pressure above the water level is 250 kPa (absolute), while the atmospheric pressure is 100 kPa. Neglecting frictional effects, determine the initial discharge rate of water from the tank. -Air 250 kPa 2.5 m d cm The initial discharge rate of water from the tank is determined to be [...
S A 10-m-long section of an 8 cm (r=4 cm) of external diameter horizontal steam water pipe passes through a large room whose temperature is To =15°C. The pipe is insulated with an insulating material of conductivity k=0.01 W/m-°C and 1 cm thick. If the inner surface temperature of the pipe is 95 °C (at r2) and the pipe is exposed to a cross wind of 6.0 m/s, determine the rate of heat loss from the pipe (neglect radiation). Thermal...
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