Page 290 - Formulas and Calculations for Petroleum Engineering

Fluid flow and transport phenomena formulas and calculations Chapter 5 283

Output(s)

h ml : Laminar Coefficient of Heat Transfer (W/m K)
h mt : Turbulent Coefficient of Heat transfer (W/m K)

Formula(s)

p ! 0 ! 0:25 1
ffiffiffi 3
ð
2 2 k ðÞ r 2Þ g H vap
h ¼ @ A
ml
3
3 m ðÞ Td ToÞ L
ð
0 1
0:5
!
3
k ðÞ r 2Þ g Td ToÞ L
ð
ð
h ¼ 0:003 @ 3 A
mt
m ðÞ H
vap
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 14, Page: 447.
5.59 Film condensation on vertical tubes
Input(s)
k: Thermal Conductivity (g m/s s s K)
r: Density (g/cc)
g: Gravitational Accelaration (m/s s)
m: Viscosity (cP)
2
τ: Rate of Condensate Flow per Unit Width to Bottom (m /s)
Td: Dew Point Temperature (K)
To: Temperature Outlet (K)
L: Length (m)
H vap : Heat of Vaporization (N)

Output(s)
h ml : Laminar Coefficient of Heat Transfer (W/m K)
h mt : Turbulent Coefficent of Heat Transfer (W/m K)

Formula(s)

0 0:334 1
3
2 !
4 k r ðÞ g
ml
h ¼ @ 3 m τ A
3
0 1
! 0:5
2
3
k r ðÞ g Td ToÞ L
ð
h ¼ 0:003 @ 3 A
mt
m ðÞ H vap
Reference: Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley & Sons,
Chapter: 14, Page: 447.