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Title:
Thermo-fluid dynamics of two-phase flow
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New York, NY : Springer, 2006
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9780387283210
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30000010133966 QA922 I83 2006 Open Access Book Book
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Summary

Summary

This book is intended to be an introduction to the theory of thermo-fluid dynamics of two-phase flow for graduate students, scientists and practicing engineers seriously involved in the subject. It can be used as a text book at the graduate level courses focused on the two-phase flow in Nuclear Engineering, Mechanical Engineering and Chemical Engineering, as well as a basic reference book for two-phase flow formulations for researchers and engineers involved in solving multiphase flow problems in various technological fields. The principles of single-phase flow fluid dynamics and heat transfer are relatively well understood, however two-phase flow thermo-fluid dynamics is an order of magnitude more complicated subject than that of the sing- phase flow due to the existence of moving and deformable interface and its interactions with the two phases. However, in view of the practical importance of two-phase flow in various modem engineering technologies related to nuclear energy, chemical engineering processes and advanced heat transfer systems, significant efforts have been made in recent years to develop accurate general two-phase formulations, mechanistic models for interfacial transfer and interfacial structures, and computational methods to solve these predictive models.


Table of Contents

Dedicationp. v
Table of Contentsp. vii
Prefacep. xiii
Forewordp. xv
Acknowledgmentsp. xvii
Part I Fundamental of two-phase flow
1 Introductionp. 1
1.1 Relevance of the problemp. 1
1.2 Characteristic of multiphase flowp. 3
1.3 Classification of two-phase flowp. 5
1.4 Outline of the bookp. 10
2 Local Instant Formulationp. 11
1.1 Single-phase flow conservation equationsp. 13
1.1.1 General balance equationsp. 13
1.1.2 Conservation equationp. 15
1.1.3 Entropy inequality and principle of constitutive lawp. 18
1.1.4 Constitutive equationsp. 20
1.2 Interfacial balance and boundary conditionsp. 24
1.2.1 Interfacial balance (Jump condition)p. 24
1.2.2 Boundary conditions at interfacep. 32
1.2.3 Simplified boundary conditionp. 38
1.2.4 External boundary condition and contact anglep. 43
1.3 Application of local instant formulation to two-phase flow problemsp. 46
1.3.1 Drag force acting on a spherical particle in a very slow streamp. 46
1.3.2 Kelvin-Helmholtz instabilityp. 48
1.3.3 Rayleigh-Taylor instabilityp. 52
Part II Two-phase field equations based on time average
3 Various Methods of Averagingp. 55
1.1 Purpose of averagingp. 55
1.2 Classification of averagingp. 58
1.3 Various averaging in connection with two-phase flow analysisp. 61
4 Basic Relations in Time Averagingp. 67
1.1 Time domain and definition of functionsp. 68
1.2 Local time fraction - Local void fractionp. 72
1.3 Time average and weighted mean valuesp. 73
1.4 Time average of derivativesp. 78
1.5 Concentrations and mixture propertiesp. 82
1.6 Velocity fieldp. 86
1.7 Fundamental identityp. 89
5 Time Averaged Balance Equationp. 93
1.1 General balance equationp. 93
1.2 Two-fluid model field equationsp. 98
1.3 Diffusion (mixture) model field equationsp. 103
1.4 Singular case of [upsilon subscript ni]=0 (quasi-stationary interface)p. 108
1.5 Macroscopic jump conditionsp. 110
1.6 Summary of macroscopic field equations and jump conditionsp. 113
1.7 Alternative form of turbulent heat fluxp. 114
6 Connection to Other Statistical Averagesp. 119
1.1 Eulerian statistical average (ensemble average)p. 119
1.2 Boltzmann statistical averagep. 120
Part III Three-dimensional model based on time average
7 Kinematics of Averaged Fieldsp. 129
1.1 Convective coordinates and convective derivativesp. 129
1.2 Streamlinep. 132
1.3 Conservation of massp. 133
1.4 Dilatationp. 140
8 Interfacial Transportp. 143
1.1 Interfacial mass transferp. 143
1.2 Interfacial momentum transferp. 145
1.3 Interfacial energy trnasferp. 149
9 Two-fluid Modelp. 155
1.1 Two-fluid model field equationsp. 156
1.2 Two-fluid model constitutive lawsp. 169
1.2.1 Entropy inequalityp. 169
1.2.2 Equation of statep. 172
1.2.3 Determinismp. 177
1.2.4 Average molecular diffusion fluxesp. 179
1.2.5 Turbulent fluxesp. 181
1.2.6 Interfacial transfer constitutive lawsp. 186
1.3 Two-fluid model formulationp. 198
1.4 Various special casesp. 205
10 Interfacial Area Transportp. 217
1.1 Three-dimensional interfacial area transport equationp. 218
1.1.1 Number transport equationp. 219
1.1.2 Volume transport equationp. 220
1.1.3 Interfacial area transport equationp. 222
1.2 One-group interfacial area transport equationp. 227
1.3 Two-group interfacial area transport equationp. 228
1.3.1 Two-group particle number transport equationp. 229
1.3.2 Two-group void fraction transport equationp. 230
1.3.3 Two-group interfacial area transport equationp. 234
1.3.4 Constitutive relationsp. 240
11 Constitutive Modeling of Interfacial Area Transportp. 243
1.1 Modified two-fluid model for the two-group interfacial area transport equationp. 245
1.1.1 Conventional two-fluid modelp. 245
1.1.2 Two-group void fraction and interfacial area transport equationsp. 246
1.1.3 Modified two-fluid modelp. 248
1.1.4 Modeling of two gas velocity fieldsp. 253
1.2 Modeling of source and sink terms in one-group interfacial area transport equationp. 257
1.2.1 Source and sink terms modeled by Wu et al. (1998)p. 259
1.2.2 Source and sink terms modeled by Hibiki and Ishii (2000a)p. 267
1.2.3 Source and sink terms modeled by Hibiki et al. (2001b)p. 275
1.3 Modeling of source and sink terms in two-group interfacial Area Transport Equationp. 276
1.3.1 Source and sink terms modeled by Hibiki and Ishii (2000b)p. 277
1.3.2 Source and sink terms modeled by Fu and Ishii (2002a)p. 281
1.3.3 Source and sink terms modeled by Sun et al. (2004a)p. 290
12 Hydrodynamic Constitutive Relations for Interfacial Transferp. 301
1.1 Transient forces in multiparticle systemp. 303
1.2 Drag force in multiparticle systemp. 308
1.2.1 Single-particle drag coefficientp. 309
1.2.2 Drag coefficient for dispersed two-phase flowp. 315
1.3 Other forcesp. 329
1.3.1 Lift Forcep. 331
1.3.2 Wall-lift (wall-lubrication) forcep. 335
1.3.3 Turbulent dispersion forcep. 336
1.4 Turbulence in multiparticle systemp. 336
13 Drift-flux Modelp. 345
1.1 Drift-flux model field equationsp. 346
1.2 Drift-flux (or mixture) model constitutive lawsp. 355
1.3 Drift-flux (or mixture) model formulationp. 372
1.3.1 Drift-flux modelp. 372
1.3.2 Scaling parametersp. 373
1.3.3 Homogeneous flow modelp. 376
1.3.4 Density propagation modelp. 378
Part IV One-dimensional model based on time average
14 One-dimensional Drift-flux Modelp. 381
1.1 Area average of three-dimensional drift-flux modelp. 382
1.2 One-dimensional drift velocityp. 387
1.2.1 Dispersed two-phase flowp. 387
1.2.2 Annular two-phase Flowp. 398
1.2.3 Annular mist Flowp. 403
1.3 Covariance of convective fluxp. 406
1.4 One-dimensional drift-flux correlations for various flow conditionsp. 411
1.4.1 Constitutive equations for upward bubbly flowp. 412
1.4.2 Constitutive equations for upward adiabatic annulus and internally heated annulusp. 412
1.4.3 Constitutive equations for downward two-phase flowp. 413
1.4.4 Constitutive equations for bubbling or boiling pool systemsp. 413
1.4.5 Constitutive equations for large diameter pipe systemsp. 414
1.4.6 Constitutive equations at reduced gravity conditionsp. 415
15 One-dimensional Two-fluid Modelp. 419
1.1 Area average of three-dimensional two-fluid modelp. 420
1.2 Special consideration for one-dimensional constitutive relationsp. 423
1.2.1 Covariance effect in field equationsp. 423
1.2.2 Effect of phase distribution on constitutive relationsp. 426
1.2.3 Interfacial shear termp. 428
Referencesp. 431
Nomenclaturep. 441
Indexp. 457