Question
In: Mechanical Engineering
4- If the drag force on a smooth sphere depends on the velocity (V), sphere diameter...
4- If the drag force on a smooth sphere depends on the velocity (V), sphere diameter (D), viscosity (?), and density (?), use dimensional analysis to show the drag coefficient on the sphere is a function of the Reynolds number only. (15%) ?
Solutions
samet mamat answered 2 years agoRelated Solutions
Find an expression for the average velocity in a smooth pipe if it depends on the...
Find an expression for the average velocity in a smooth pipe if
it depends on the viscosity, the diameter, and the pressure
gradient dp/dx.
Drag measurements were taken for a 5 cm diameter sphere in water at 20 °C to...
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) = 1.0 X 10-6
m2/s and kinematic viscosity of air (v) = 1.46
X 10-5 m2/s.
Perform the Buckingham Pi theorem to generate a relationship
for FD as a function of the independent variables.
Assume the drag FD is a...
Drag measurements were taken for a 5 cm diameter sphere in water at 20 °C to...
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) = 1.0 X 10-6
m2/s and kinematic viscosity of air (v) = 1.46
X 10-5 m2/s.
Perform the Buckingham Pi theorem to generate a relationship
for FD as a function of the independent variables.
Assume the drag FD is a...
A 6.2-mm-diameter electrical transmission line is exposed to windy air. Determine the drag force exerted on...
A 6.2-mm-diameter electrical transmission line is exposed to
windy air. Determine the drag force exerted on a 165-m-long section
of the wire during a windy day when the air is at 1 atm and 15°C
and the wind is blowing across the transmission line at 65
km/h.
The density and kinematic viscosity of air at 1 atm and 15°C are
ρ = 1.225 kg/m3 and ν = 1.470×10-5
m2/s.
_____ N
Air at 20°C (1 atm) is flowing over a 0.025-m diameter sphere with a velocity of...
Air at 20°C (1 atm) is flowing over a 0.025-m diameter sphere with
a velocity of 3.5 m/s. If the surface temperature of the sphere is
constant at 80°C, determine the Reynolds number corresponding to
the sphere, its average drag co-efficient, and the heat transfer
rate from the sphere. The properties of air (1 atm) at the free
stream temperature T∞ = 20°C, ρ = 1.204
kg/m3, k = 0.02514
W/m∙K, μ = 1.825 × 10−5 kg/m∙s,
and Pr = 0.7309. At the surface
temperature Ts=
80°C: μs =...
Determine the force (in the lab frame) between two charges moving with the same velocity V....
Determine the force (in the lab frame) between two charges
moving with the same velocity V. What is the ratio of
transverse-to-longitudinal force? Explain what happens to this
ratio when the two charges lie on a line parallel to V or
perpendicular to V?
Air at 25°C flows over a 10-mm-diameter sphere with a velocity of 20 m/s, while the...
Air at 25°C flows over a 10-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? q = ___ W ?
Please provide correct final answer for guaranteed
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When a parachute opens, the air exerts a large drag force on it. This upward force...
When a parachute opens, the air exerts a large drag force on it.
This upward force is initially greater than the weight of the sky
diver and, thus, slows him down. Suppose the weight of the sky
diver is 852 N and the drag force has a magnitude of 1018 N. The
mass of the sky diver is 86.9 kg. Take upward to be the positive
direction. What is his acceleration, including sign?
A sphere of radius r has surface area A = 4πr2 and volume V = 4...
A sphere of radius r has surface area A = 4πr2 and volume V = 4
3 πr3. The radius of sphere 2 is triple the radius of sphere 1.
(a)What is the ratio of the areas, A2/A1?
(b) What is the ratio of the volumes, V2/V1?
how smooth increase in muscle force is produced
how smooth increase in muscle force is produced
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