LESSON: Heat transfer
Explain what the characteristic dimension of x,L,D is for
different geometries in calculation...
LESSON: Heat transfer
Explain what the characteristic dimension of x,L,D is for
different geometries in calculation of dimensionless numbers
(Nu,Re,Gr) in forced and natural Transport.
Heat Transfer Mechanisms
What are the four mechanisms of
heat/energy transfer? Give an example for each. What happens to
energy when water evaporates – gained or lost? What happens to
energy when water condenses –gained or lost? Explain how
thermohaline circulation of ocean water affects global temperature
distribution. Must be 350 words long.
give a good explanation and examples
of each. this is physical geography. they have to be long
explanation.
A Tank with a dimension of length (L) x width (B) x
height (H) of 4m x 2m x 2m is filled with 1m depth of water and
with oil to the fullest. Density of oil ρm= 801 kg/m3. The tank is
open.
1.Calculate and draw pressure distribution on tank wall
2.Calculate force on the length and width side of tank wall, also
on the bottom of the tank Given: ρwater= 1000 kg/m3 , g = 9,81
m/sec2
Explain heat transfer, latent heat and change in temperature for
the following case: Ice kept at -10 degrees C temperature turns
into water at +10 degrees C temperature upon heating.
what is the three forms of heat transfer?
(explain with each type with equations)
give equation for net rate of heat transfer by radiation &
explain terms used.
What is the therotiacal And The expertmatla heat transfer
cofficnent for heat exchanger in my case shell and tube
Therotical ?
formual ??
expermantial ?
formula ?
I am uisng LMTD method
Heat equation: Arbitrary temperatures at ends. If the ends x =
0 and x = L of the bar in the text are kept at constant
temperatures U1 and U2, respectively. The initial temp distribution
is given by u(x, 0) = f (x).
(a) What is the temperature u1(x) in the bar after a long time
(theoretically, as t → ∞)? First guess, then calculate.
(b) What is the temperature at any t. Use the heat equation
given by ut...