Opis: Convection Heat Transfer - Adrian Bejan

Written by an internationally recognized authority on heat transfer and thermodynamics, this second edition of Convection Heat Transfer contains new and updated problems and examples reflecting real-world research and applications, including heat exchanger design. Teaching not only structure but also technique, the book begins with the simplest problem solving method (scale analysis), and moves on to progressively more advanced and exact methods (integral method, self similarity, asymptotic behavior). A solutions manual is available for all problems and exercises.Preface xv Preface to the Third Edition xvii Preface to the Second Edition xxi Preface to the First Edition xxiii List of Symbols xxv 1 Fundamental Principles 1 1.1 Mass Conservation / 2 1.2 Force Balances (Momentum Equations) / 4 1.3 First Law of Thermodynamics / 8 1.4 Second Law of Thermodynamics / 15 1.5 Rules of Scale Analysis / 17 1.6 Heatlines for Visualizing Convection / 21 References / 22 Problems / 25 2 Laminar Boundary Layer Flow 30 2.1 Fundamental Problem in Convective Heat Transfer / 31 2.2 Concept of Boundary Layer / 34 2.3 Scale Analysis / 37 2.4 Integral Solutions / 42 2.5 Similarity Solutions / 48 2.5.1 Method / 48 2.5.2 Flow Solution / 51 2.5.3 Heat Transfer Solution / 53 2.6 Other Wall Heating Conditions / 56 2.6.1 Unheated Starting Length / 57 2.6.2 Arbitrary Wall Temperature / 58 2.6.3 Uniform Heat Flux / 60 2.6.4 Film Temperature / 61 2.7 Longitudinal Pressure Gradient: Flow Past a Wedge and Stagnation Flow / 61 2.8 Flow Through the Wall: Blowing and Suction / 64 2.9 Conduction Across a Solid Coating Deposited on a Wall / 68 2.10 Entropy Generation Minimization in Laminar Boundary Layer Flow / 71 2.11 Heatlines in Laminar Boundary Layer Flow / 74 2.12 Distribution of Heat Sources on a Wall Cooled by Forced Convection / 77 2.13 The Flow of Stresses / 79 References / 80 Problems / 82 3 Laminar Duct Flow 96 3.1 Hydrodynamic Entrance Length / 97 3.2 Fully Developed Flow / 100 3.3 Hydraulic Diameter and Pressure Drop / 103 3.4 Heat Transfer To Fully Developed Duct Flow / 110 3.4.1 Mean Temperature / 110 3.4.2 Fully Developed Temperature Profile / 112 3.4.3 Uniform Wall Heat Flux / 114 3.4.4 Uniform Wall Temperature / 117 3.5 Heat Transfer to Developing Flow / 120 3.5.1 Scale Analysis / 121 3.5.2 Thermally Developing Hagen--Poiseuille Flow / 122 3.5.3 Thermally and Hydraulically Developing Flow / 128 3.6 Stack of Heat-Generating Plates / 129 3.7 Heatlines in Fully Developed Duct Flow / 134 3.8 Duct Shape for Minimum Flow Resistance / 137 3.9 Tree-Shaped Flow / 139 References / 147 Problems / 153 4 External Natural Convection 168 4.1 Natural Convection as a Heat Engine in Motion / 169 4.2 Laminar Boundary Layer Equations / 173 4.3 Scale Analysis / 176 4.3.1 High-Pr Fluids / 177 4.3.2 Low-Pr Fluids / 179 4.3.3 Observations / 180 4.4 Integral Solution / 182 4.4.1 High-Pr Fluids / 183 4.4.2 Low-Pr Fluids / 184 4.5 Similarity Solution / 186 4.6 Uniform Wall Heat Flux / 189 4.7 Effect of Thermal Stratification / 192 4.8 Conjugate Boundary Layers / 195 4.9 Vertical Channel Flow / 197 4.10 Combined Natural and Forced Convection (Mixed Convection) / 200 4.11 Heat Transfer Results Including the Effect of Turbulence / 203 4.11.1 Vertical Walls / 203 4.11.2 Inclined Walls / 205 4.11.3 Horizontal Walls / 207 4.11.4 Horizontal Cylinder / 209 4.11.5 Sphere / 209 4.11.6 Vertical Cylinder / 210 4.11.7 Other Immersed Bodies / 211 4.12 Stack of Vertical Heat-Generating Plates / 213 4.13 Distribution of Heat Sources on a Vertical Wall / 216 References / 218 Problems / 221 5 Internal Natural Convection 233 5.1 Transient Heating from the Side / 233 5.1.1 Scale Analysis / 233 5.1.2 Criterion for Distinct Vertical Layers / 237 5.1.3 Criterion for Distinct Horizontal Jets / 238 5.2 Boundary Layer Regime / 241 5.3 Shallow Enclosure Limit / 248 5.4 Summary of Results for Heating from the Side / 255 5.4.1 Isothermal Sidewalls / 255 5.4.2 Sidewalls with Uniform Heat Flux / 259 5.4.3 Partially Divided Enclosures / 259 5.4.4 Triangular Enclosures / 262 5.5 Enclosures Heated from Below / 262 5.5.1 Heat Transfer Results / 263 5.5.2 Scale Theory of the Turbulent Regime / 265 5.5.3 Constructal Theory of B'enard Convection / 267 5.6 Inclined Enclosures / 274 5.7 Annular Space Between Horizontal Cylinders / 276 5.8 Annular Space Between Concentric Spheres / 278 5.9 Enclosures for Thermal Insulation and Mechanical Strength / 278 References / 284 Problems / 289 6 Transition to Turbulence 295 6.1 Empirical Transition Data / 295 6.2 Scaling Laws of Transition / 297 6.3 Buckling of Inviscid Streams / 300 6.4 Local Reynolds Number Criterion for Transition / 304 6.5 Instability of Inviscid Flow / 307 6.6 Transition in Natural Convection on a Vertical Wall / 313 References / 315 Problems / 318 7 Turbulent Boundary Layer Flow 320 7.1 Large-Scale Structure / 320 7.2 Time-Averaged Equations / 322 7.3 Boundary Layer Equations / 325 7.4 Mixing Length Model / 328 7.5 Velocity Distribution / 329 7.6 Wall Friction in Boundary Layer Flow / 336 7.7 Heat Transfer in Boundary Layer Flow / 338 7.8 Theory of Heat Transfer in Turbulent Boundary Layer Flow / 342 7.9 Other External Flows / 347 7.9.1 Single Cylinder in Cross Flow / 347 7.9.2 Sphere / 349 7.9.3 Other Body Shapes / 350 7.9.4 Arrays of Cylinders in Cross Flow / 351 7.10 Natural Convection Along Vertical Walls / 356 References / 359 Problems / 361 8 Turbulent Duct Flow 369 8.1 Velocity Distribution / 369 8.2 Friction Factor and Pressure Drop / 371 8.3 Heat Transfer Coefficient / 376 8.4 Total Heat Transfer Rate / 380 8.4.1 Isothermal Wall / 380 8.4.2 Uniform Wall Heating / 382 8.4.3 Time-Dependent Heat Transfer / 382 8.5 More Refined Turbulence Models / 383 8.6 Heatlines in Turbulent Flow Near a Wall / 387 8.7 Channel Spacings for Turbulent Flow / 389 References / 390 Problems / 392 9 Free Turbulent Flows 398 9.1 Free Shear Layers / 398 9.1.1 Free Turbulent Flow Model / 398 9.1.2 Velocity Distribution / 401 9.1.3 Structure of Free Turbulent Flows / 402 9.1.4 Temperature Distribution / 404 9.2 Jets / 405 9.2.1 Two-Dimensional Jets / 406 9.2.2 Round Jets / 409 9.2.3 Jet in Density-Stratified Reservoir / 411 9.3 Plumes / 413 9.3.1 Round Plume and the Entrainment Hypothesis / 413 9.3.2 Pulsating Frequency of Pool Fires / 418 9.3.3 Geometric Similarity of Free Turbulent Flows / 421 9.4 Thermal Wakes Behind Concentrated Sources / 422 References / 425 Problems / 426 10 Convection with Change of Phase 428 10.1 Condensation / 428 10.1.1 Laminar Film on a Vertical Surface / 428 10.1.2 Turbulent Film on a Vertical Surface / 435 10.1.3 Film Condensation in Other Configurations / 438 10.1.4 Drop Condensation / 445 10.2 Boiling / 447 10.2.1 Pool Boiling Regimes / 447 10.2.2 Nucleate Boiling and Peak Heat Flux / 451 10.2.3 Film Boiling and Minimum Heat Flux / 454 10.2.4 Flow Boiling / 457 10.3 Contact Melting and Lubrication / 457 10.3.1 Plane Surfaces with Relative Motion / 458 10.3.2 Other Contact Melting Configurations / 462 10.3.3 Scale Analysis and Correlation / 464 10.3.4 Melting Due to Viscous Heating in the Liquid Film / 466 10.4 Melting By Natural Convection / 469 10.4.1 Transition from the Conduction Regime to the Convection Regime / 469 10.4.2 Quasisteady Convection Regime / 472 10.4.3 Horizontal Spreading of the Melt Layer / 474 References / 478 Problems / 482 11 Mass Transfer 489 11.1 Properties of Mixtures / 489 11.2 Mass Conservation / 492 11.3 Mass Diffusivities / 497 11.4 Boundary Conditions / 499 11.5 Laminar Forced Convection / 501 11.6 Impermeable Surface Model / 504 11.7 Other External Forced Convection Configurations / 506 11.8 Internal Forced Convection / 509 11.9 Natural Convection / 511 11.9.1 Mass-Transfer-Driven Flow / 512 11.9.2 Heat-Transfer-Driven Flow / 513 11.10 Turbulent Flow / 516 11.10.1 Time-Averaged Concentration Equation / 516 11.10.2 Forced Convection Results / 517 11.10.3 Contaminant Removal from a Ventilated Enclosure / 520 11.11 Massfunction and Masslines / 527 11.12 Effect of Chemical Reaction / 527 References / 531 Problems / 532 12 Convection in Porous Media 537 12.1 Mass Conservation / 537 12.2 Darcy Flow Model and the Forchheimer Modification / 540 12.3 First Law of Thermodynamics / 542 12.4 Second Law of Thermodynamics / 546 12.5 Forced Convection / 547 12.5.1 Boundary Layers / 547 12.5.2 Concentrated Heat Sources / 552 12.5.3 Sphere and Cylinder in Cross Flow / 553 12.5.4 Channel Filled with Porous Medium / 554 12.6 Natural Convection Boundary Layers / 555 12.6.1 Boundary Layer Equations: Vertical Wall / 555 12.6.2 Uniform Wall Temperature / 556 12.6.3 Uniform Wall Heat Flux / 558 12.6.4 Spacings for Channels Filled with Porous Structures / 559 12.6.5 Conjugate Boundary Layers / 562 12.6.6 Thermal Stratification / 563 12.6.7 Sphere and Horizontal Cylinder / 566 12.6.8 Horizontal Walls / 567 12.6.9 Concentrated Heat Sources / 567 12.7 Enclosed Porous Media Heated from the Side / 571 12.7.1 Four Heat Transfer Regimes / 571 12.7.2 Convection Results / 575 12.8 Penetrative Convection / 577 12.8.1 Lateral Penetration / 577 12.8.2 Vertical Penetration / 578 12.9 Enclosed Porous Media Heated from Below / 579 12.9.1 Onset of Convection / 579 12.9.2 Darcy Flow / 583 12.9.3 Forchheimer Flow / 585 12.10 Multiple Flow Scales Distributed Nonuniformly / 587 12.10.1 Heat Transfer / 590 12.10.2 Fluid Friction / 591 12.10.3 Heat Transfer Rate Density: The Smallest Scale for Convection / 591 12.11 Natural Porous Media: Alternating Trees / 592 References / 595 Problems / 598 Appendixes 607 A Constants and Conversion Factors / 609 B Properties of Solids / 615 C Properties of Liquids / 625 D Properties of Gases / 633 E Mathematical Formulas / 639 Author Index 641 Subject Index 653

Szczegóły: Convection Heat Transfer - Adrian Bejan

Tytuł: Convection Heat Transfer
Autor: Adrian Bejan
Producent: John Wiley
ISBN: 9780470900376
Rok produkcji: 2013
Ilość stron: 696
Oprawa: Twarda
Waga: 1.09 kg

Recenzje: Convection Heat Transfer - Adrian Bejan