A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 1 doc

... [5.6] 13 . Isothermal ellipsoid of semimajoraxis b and semiminor axes a conducts heat into an inﬁnitemedium at T∞; b> ;a( see 4)4πb 1 a 2 b 2 tanh 1  1 a 2 b 2 meter [5 .16 ] 24 6 26 2 ... 5 .1 0a Φ 1 (Fo 1 = 0.565, Bi 1 = 0 . 21 05)= 0 .10 Φ 2 (Fo 2 = 0.565, Bi 2 = 0 . 21 05)= 0 .10 and, with eqn. (5.7 3a) ,Φ = Φ 1 +Φ 2 ( 1 − Φ 1 )= 0 .19 The mean temperature isΘ =T 20 10 0 − 20 = 1 −Φ = 0. 81 soT ... medium atT∞(see items 4 and 7)4πR 1 +R/2hmeter [5 .18 ]9. Parallel cylinders exchange heat inan inﬁnite conducting medium 2 cosh 1 L 2 −R 2 1 −R 2 22R 1 R 2 none [5.6] 10 . Same as 9,...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 3 pot

... = 3 20 φ− 3 28 0φ 3 = 3 2u∞(6. 52) Since φ is a constant for any Pr [recall eqn. (6.46)], we separate variables: 2 tdδtdx=dδ 2 tdx= 3 /u∞ 3 20 φ − 3 28 0φ 3  §6.5 Heat transfer ... 0.0 021 35 soτyx= (0.0 021 35 )1 2 ρu 2 ∞=(0.0 021 35 )(1.05)(15) 2 2= 0 .25 22 kg/m·s 2 and the force isτyx A = 0 .25 22( 0.5) 2 = 0.0 630 5 kg·m/s 2 = 0.0 630 5 N= 0 . 23 oz6.7 Turbulent boundary layersTurbulenceBig ... pressure, especially in liq-uids.Example 6.5Air at 20 ◦C and moving at 15 m/s is warmed by an isothermal steam-heated plate at 110C, ẵ m in length andẵminwidth. Find theaverage heat transfer coecient...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 4 ppt

... transitionalvalue. Problems 3356.31 A thin metal sheet separates air at 44 ◦C, flowing at 48 m/s,from water at 4 ◦C, flowing at 0.2m/s. Both fluids start at a leading edge and move in the same ... at 25 ◦C flows at 0.7m/s over a 4 cm-long flat heaterat 60◦C. Find h, τw, h(x = 0. 04 m), and δ(x = 0. 04 m).6 .20 A large plate is at rest in water at 15◦C. The plate is suddenlytranslated ... W/m 2 ) were instead fixed at its average value of 76◦C, whatwould the average wall heat flux be?6 .26 A cold, 20 mph westerly wind at 20 ◦F cools a rectangular build-ing, 35 ft by 35 ft by 22 ...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 5 pptx

... and J. P. Hart-nett, editors, Advances in Heat Transfer, volume 6, pages 50 4 56 4.Academic Press, Inc., New York, 1970.[6.14] A. A. Žukauskas and A. B. Ambrazyavichyus. Heat transfer from a ... that of predictinglaminar convection in a pipe.7 .2 Heat transfer to and from laminar flows in pipesNot many industrial pipe flows are laminar, but laminar heating and cool-ing does occur in an ... from a plate in a liquid flow. Int. J. Heat Mass Transfer, 3(4):3 05 309,1961.[6. 15] A. Žukauskas and A. Šlanciauskas. Heat Transfer in TurbulentFluid Flows. Hemisphere Publishing Corp., Washington,...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 6 pptx

... fins of a heat exchanger may form a rect-angular passage through which air flows. Sometimes, the passage cross-section is very irregular, as might happen when fluid passes through a clearance between ... situations, but all must be viewed critically.Many are based on limited data, and many incorporate systematic errorsof one kind or another.In the face of a heat transfer situation that has ... 3 .60 8Rectangular a = 2b 3.391 4. 123 a = 4b 4.439 5.331 a = 8b 5.597 6. 490Parallel plates 7.541 8 .23 5different wall boundary conditions and a wide variety cross-sectionalshapes, both practical and ridiculous:...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 8 docx

... by Fujii and Imura [8. 16], Vliet [8. 17], Pera andGebhart [8. 18] , and Al-Arabi and El-Riedy [8. 19], among others. 8. 5 Film condensation 431on the same basis. The integration of eqn. (8. 47) subject ... 434 Natural convection in single-phase fluids and during film condensation 8. 5Figure 8. 12 Results of the exact b.l. analysis of laminar filmcondensation on a vertical plate [8. 36].Sadasivan and ... trans- 8. 4 Natural convection in other situations 417Figure 8. 6 The data of many investigators for heat transfer from isothermal horizontal cylinders during natural convec-tion, as correlated...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 9 pdf

... onnatural convection heat transfer from a horizontal plates. Int. J. Heat Mass Transfer, 17(1):135–1 42, 197 4. 458 Heat transfer in boiling and other phase-change congurations 9. 1Figure 9. 1 ... 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 ... shapes. Int. J. Heat Mass Transfer, 19: 1 399 –1404, 197 6.[8 .20 ] L. Pera and B. Gebhart. Natural convection boundary layer flowover horizontal and slightly inclined surfaces. Int. J. Heat Mass Transfer, ...

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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 congurations Đ9 .2 Table 9 .2 Selected values of the surface ... 25 8 2. 80 25 5 2. 29 25 3 1.95Isopropyl alcohol 10 to 100 22 .90 0.0789Mercury 5 to 20 0 490.60 .20 49Methane 90 18.877 100 16. 328 115 12. 371Methyl alcohol 10 to 60 24 .00 0.0773Naphthalene 100 ... to 20 0 42. 84 0. 1107 Nicotine −40 to 90 41.07 0.11 12 Nitrogen −195 to −183 26 . 42 0 .22 65Octane 10 to 120 23 . 52 0.09509Oxygen 20 2 to −184 −33. 72 −0 .25 61Pentane 10 to 30 18 .25 0.11 021 Toluene 10...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 1 potx

... R -1 2 5 1. 10R -1 2 1. 50 R- 13 4a 1. 63 R-22 2.20 R -1 5 2a 1. 10R -3 2 1. 20 R- 41 0a 1. 72so thathfbhlo= fn(Bo, Co)(9.49)When the convection number is large (Co  1) , as for low quality,nucleate boiling ... 30 5.6kg/m2sandRelo=GDàf= (30 5.6)(0.05) 1. 297 × 10 −4= 1. 178 × 10 5From eqns. (7.42) and (7. 43) :f = 1  1. 82 log 10 (1. 178 ì 10 5) 1. 642= 0. 01 736 NuD=(0. 01 736 /8) 1. 178 ì 10 5 10 00(0.892) 1 + 12 .70. 01 736 /8(0.892)2 /3 1 = ... 5 01 Table 9.4 Fluid-dependent parameter F in the Kandlikar cor-relation for copper tubing. Additional values are given in [9.47].Fluid F Fluid FWater 1. 0 R -1 2 4 1. 90Propane 2 .15 R -1 2 5 1. 10R -1 2 ...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 2 potx

... Int. J. Heat Mass Transfer, 13: 1 425 –1 439 ,1970.[9. 23 ] J. S. Ded and J. H. Lienhard. The peak pool boiling heat flux from a sphere. AIChE J., 18 (2) :33 7 34 2, 19 72. [9 .24 ] A. L. Bromley. Heat transfer ... correlation for saturated two-phase flowboiling heat transfer inside horizontal and vertical tubes. J. Heat Transfer, 1 12( 1) :21 9 22 8, 1990. §10 .3 Radiant heat exchange between two finite black ... Chen. A correlation for boiling heat transfer to saturatedfluids in convective flow. ASME Prepr. 6 3- HT -3 4 , 5th ASME-AIChE Heat Transfer Conf. Boston, August 19 63. [9.45] S. G. Kandlikar. A general...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 3 doc

... §10.4 Heat transfer among gray bodies 5 53 Additional two-body exchange problemsRadiation shields. A radiation shield is a surface, usually of high re-flectance, that is placed between a high-temperature ... equa-tions above.Figure 10.16 Illustration forExample 10.9. §10.4 Heat transfer among gray bodies 54910.4 Heat transfer among gray bodiesElectrical analogy for gray body heat exchangeAn ... surfaces that exchange radi-ation with one another. The evaluation of radiant heat transfer amongthese surfaces proceeds in essentially the same way as for three surfaces.For multisurface...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 6 docx

... 59.72.0 16 Air 3. 711 78 .62 8. 96 H2O2 .65 5 a 36 3 a 18.02Ar 3. 542 93. 339 .95 H2O2 .64 1b809.1bBr24.2 96 507.9 159.8H2O24.1 96 289 .33 4.01C3 .38 5 30 .61 2.01 H2S3 .6 23 301. 134 .08CCl2F25.25 2 53 ... 28.85Cyclohexane 0.117 33 . 03 n-Heptane 0.1 63 31 .69 n-Octane 0.185 34 .14n-Nonane 0.207 36 . 53 n-Decane 0.229 39 .33 Acetone 0.074 28.90Benzene 0.0 96 30 . 76 Carbon tetrachloride 0.102 29. 93 Ethyl bromide ... O2 3. 467 1 06. 732 .00C 6 H 6 5 .34 9 412 .37 8.11 SO24.112 33 5. 464 . 06 Cl24.217 31 6. 070.91 Xe 4.047 231 .0 131 .3 F2 3. 357 112. 63 8 .00 a Based on mass diffusion data.bBased on viscosity and thermal...

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A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 7 doc

... possi-bilities in turn. Heat transfer at low rates of mass transfer One very common case of low-rate heat and mass transfer is the evapora-tion of water into air at low or moderate temperatures. ... mass transfer. Coupling can arise when temperature-dependent mass transfer pro-cesses cause heat to be released or absorbed at a surface. For example,during evaporation, latent heat is absorbed at a liquid surface ... surfacetemperature of the burning carbon.Simultaneous heat and mass transfer processes may be classified aslow-rate or high-rate. At low rates of mass transfer, mass transfer hasonly a negligible influence...

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