A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 10 pptx
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 10 pptx
... quite ac- curate and widely-used, semi-empirical equation for correlating surface 470 Heat transfer in boiling and other phase-change configurations §9 .2 Table 9 .2 Selected values of the surface ... 25 8 2. 80 25 5 2. 29 25 3 1.95 Isopropyl alcohol 10 to 100 22 .90 0.0789 Mercury 5 to 20 0 490.60 .20 49 Methane 90 18.877 100 16. 328 115 12. 371 Methyl alcohol 10 to 60 24...
Ngày tải lên: 07/08/2014, 10:20
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 5 pptx
... and J. P. Hart- nett, editors, Advances in Heat Transfer, volume 6, pages 504–564. Academic Press, Inc., New York, 1970. [6.14] A. A. Žukauskas and A. B. Ambrazyavichyus. Heat transfer from a ... that of predicting laminar convection in a pipe. 7 .2 Heat transfer to and from laminar flows in pipes Not many industrial pipe flows are laminar, but laminar heating and cool- ing d...
Ngày tải lên: 07/08/2014, 10:20
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 6 pptx
... of heat transfer to the liquid eutectic mixture of 77 .2% potassium and 22 .8% sodium (called NaK). NaK is a fairly popular low-melting-point metallic coolant which has received a good deal of attention ... 0. 02 Pe 0.8 D (7.53) (Earlier work by Seban and Shimazaki [7 .20 ] had suggested C 1 = 4.8 and C 2 = 0. 025 .) For uniform wall heat flux, many more data are available, 380 F...
Ngày tải lên: 07/08/2014, 10:20
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 1 doc
... butter tub. 5.51 A two-dimensional, 90 ◦ annular sector has an adiabatic inner arc, r = r i , and an adiabatic outer arc, r = r o . The flat sur- face along θ = 0 is isothermal at T 1 , and the flat surface along θ ... is adiabatic for 2 in. and 90 ◦ F for 1 inch. The re- maining surfaces are adiabatic. Find the rate of heat transfer. [Q = 36.8 W.] 5 .22 Obtain the shape factor for any...
Ngày tải lên: 07/08/2014, 10:20
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 3 pot
... pressure, especially in liq- uids. Example 6.5 Air at 20 ◦ C and moving at 15 m/s is warmed by an isothermal steam- heated plate at 110 ◦ C, ½ m in length and½minwidth. Find the average heat transfer ... layer thicknesses Dimensional analysis We must now look more closely at the implications of the similarity be- tween the velocity and thermal boundary layers. We first ask what dimen- s...
Ngày tải lên: 07/08/2014, 10:20
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 4 ppt
... laminar region. They are reasonably accurate for Reynolds numbers ranging from about 10 6 to 10 9 . A more accurate 322 Laminar and turbulent boundary layers §6.8 formula for C f , valid for all ... boundary layers The preceding discussion has circumvented serious analysis of heat trans- fer in turbulent boundary layers. In the past, boundary layer heat trans- fer has been analyzed...
Ngày tải lên: 07/08/2014, 10:20
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 8 docx
... h fg : h fg = 22 57 1 + 0.683 − 0 .22 8 1. 72 4 .21 6 (10) 22 57 = 22 80 kJ/kg so δ = 4(0.681) (10) (0 .29 0 )10 −6 x (957 .2 −0.6)(9.8) (22 80) (10) 3 1/4 = 0.000138 x 1/4 Then δ(L) = 0.0001 02 m = 0.1 02 mm 430 ... condensate film. Notice that if we condensed water at 1 atm on a wall 10 ◦ C below T sat , then Ja would equal 4.174 (10 /22 57) = 0.0185. Although...
Ngày tải lên: 07/08/2014, 10:20
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 9 pdf
... Natural convection heat transfer from a plate with arbitrary inclination. Int. J. Heat Mass Transfer, 15(4): 755–767, 19 72. [8.17] G. C. Vliet. Natural convection local heat transfer on constant ... a constant-wall-temperature heater in calculating the convective part of the heat transfer? The surroundings are at 20 ◦ C and the surrounding room is virtually black. 8.4...
Ngày tải lên: 07/08/2014, 10:20