Question
In: Mechanical Engineering
2. Initially, the steel sphere with a diameter of 15 cm with a temperature of 200°C...
2. Initially, the steel sphere with a diameter of 15 cm with a temperature of 200°C was left to cool in the airflow at a temperature of 6 m/s. By making the necessary acceptances, calculate the amount of time the aluminum sphere will fall to a temperature of 50°C.
The relevant correlation for forced transport on the sphere;
NuD = 2 + (0.4 ReD 0.5+ 0.06 ReD 2/3) Pr 0.6 (μo/μy)1/4
Solutions
samet mamat answered 1 year agoRelated Solutions
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A 1.5 kg solid brass sphere is initially at a temperature of
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(a) If the volume of the sphere is to increase by 2.50%, what is
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(b) If the sphere is heated to 225°C. What is the change in the
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A sphere with a diameter of 70 cm is held at a temperature of
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. A 20 mm diameter sphere made of aluminum alloy 2024 initially at a uniform temperature...
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b.) what fraction of the total coefficient is contributed by
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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
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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
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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 thin plate is initially at a uniform temperature of 200°C. At a certain timet =...
A thin plate is initially at a uniform temperature of 200°C. At
a certain timet = 0 the temperature of the east side of
the plate is suddenly reduced to 0°C. The other surface is
insulated. Use the explicit finite volume method in con- junction
with a suitable time step size to calculate the transient
temperature distribution of the slab and compare it with the
analytical solution at time (i) t = 40 s, (ii) t
= 80 s and...
Water at 15°C enters a tube of 2 cm of diameter with flow rate 3953 kg/h....
Water at 15°C enters a tube of 2 cm of diameter with flow rate
3953 kg/h. Assume the ratio L/D >10, and the wall temperature is
constant at 80◦C. The outlet temperature is 50°C The properties of
water at the film temperature are density rho = ? = 985 ?/?3,
specific heat ?p = 4180 ?/?, conductivity ? = 0.651 ?/?, dynamic
viscosity mu= ?? = 4.71 × 10−4 ?/?, At the wall temperature of 80°C
we have dynamic viscosity...
100 people enter a room that is initially at a temperature of 15 C and pressure...
100 people enter a room that is initially at a temperature of 15
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room at a constant rate of 300 W at a constant temperature of 37 C.
The air mass in the room is 750 Kg, remains constant and its cv =
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kJ/(Kg K). Air enters the room at a temperature...
100. mL of H2O is initially at room temperature (22.0∘C). A chilled steel rod at 2.0∘C...
100. mL of H2O is initially at room temperature (22.0∘C). A
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temperature of the system is 21.1 ∘C, what is the mass of the steel
bar? Specific heat of water = 4.18 J/g⋅∘C Specific heat of steel =
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A spherical steel ball bearing has a diameter of 2.540 cm at 29.00°C. (Assume the coefficient...
A spherical steel ball bearing has a diameter of 2.540 cm at
29.00°C. (Assume the coefficient of linear expansion for steel is
11 ✕ 10−6 (°C)−1. )
(a) What is its diameter when its temperature is raised to
96.0°C? (Give your answer to at least four significant figures.)
cm
(b) What temperature change is required to increase its volume
by 0.800%?
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