Hydrodynamics around cylindrical strucures

✍ Scribed by B. Mutlu Sumer, Jorgen Fredsoe

• Publisher: World Scientific Publishing
• Year: 2006
• Tongue: English
• Leaves: 550
• Series: Advanced series on ocean engineering 26
• Edition: Revised ed
• Category: Library

✦ Synopsis

This book discusses the subject of wave/current flow around a cylinder, the forces induced on the cylinder by the flow, and the vibration pattern of slender structures in a marine environment. The primary aim of the book is to describe the flow pattern and the resulting load which develops when waves or current meet a cylinder. Special attention is paid to circular cylinder. The development in the forces is related to the various flow patterns and is discussed in detail. Regular as well as irregular waves are considered, and special cases like wall proximities (pipelines) are also investigated.

✦ Table of Contents

Contents......Page 16
PREFACE......Page 6
CREDITS......Page 8
LIST OF SYMBOLS......Page 10
1.1 Regimes of flow around a smooth circular cylinder......Page 20
1.2 Vortex shedding......Page 25
References......Page 52
2. Forces on a cylinder in steady current......Page 55
2.1 Drag and lift......Page 56
2.2 Mean drag......Page 59
2.3 Oscillating drag and lift......Page 69
2.4 Effect of cross-sectional shape on force coefficients......Page 71
2.5 Effect of incoming turbulence on force coefficients......Page 72
2.6 Effect of angle of attack on force coefficients......Page 74
2.7 Forces on a cylinder near a wall......Page 76
References......Page 89
3. Flow around a cylinder in oscillatory flows......Page 92
3.1 Flow regimes as a function of Keulegan-Carpenter number......Page 93
3.2 Vortex-shedding regimes......Page 97
3.3 Effect of Reynolds number on flow regimes......Page 108
3.4 Effect of wall proximity on flow regimes......Page 111
3.5 Correlation length......Page 123
3.6 Streaming......Page 135
References......Page 139
4.1 In-line force in oscillatory flow......Page 142
4.2 Lift force in oscillatory flow......Page 168
4.3 Effect of roughness......Page 172
4.4 Effect of coexisting current......Page 176
4.5 Effect of angle of attack......Page 180
4.6 Effect of orbital motion......Page 182
4.7 Forces on a cylinder near a wall......Page 199
4.8 Forces resulting from breaking-wave impact......Page 206
References......Page 220
5.1 Direct solutions of Navier-Stokes equations......Page 229
5.2 Discrete vortex methods......Page 252
5.3 Hydrodynamic stability approach......Page 267
References......Page 285
6. Diffraction effect. Forces on large bodies......Page 292
6.1 Vertical circular cylinder......Page 295
6.2 Horizontal circular cylinder near or on the seabottom. Pipelines......Page 308
References......Page 314
7.1 Statistical treatment of irregular waves......Page 316
7.2 Forces on cylinders in irregular waves......Page 338
References......Page 349
8. Flow-induced vibrations of a free cylinder in steady currents......Page 353
8.1 A summary of solutions to vibration equation......Page 354
8.2 Damping of structures......Page 361
8.3 Cross-flow vortex-induced vibrations of a circular cylinder......Page 372
8.4 In-line vibrations of a circular cylinder......Page 395
8.5 Flow around and forces on a vibrating cylinder......Page 402
8.6 Galloping......Page 416
8.7 Suppression of vibrations......Page 426
References......Page 432
9.1 Introduction......Page 437
9.2 Cross-flow vibrations......Page 440
9.3 In-line vibrations......Page 460
9.4 In-line oscillatory motion......Page 462
9.5 Flow around and forces on a vibrating cylinder......Page 464
References......Page 469
10. Vibrations of marine pipelines......Page 473
10.1 Cross-flow vibrations of pipelines......Page 474
10.2 In-line vibrations and in-line motions of pipelines......Page 490
10.3 Effect of Reynolds number......Page 492
10.4 Effect of scoured trench......Page 498
10.5 Vibrations of pipelines in irregular waves......Page 500
10.7 Forces on a vibrating pipeline......Page 505
References......Page 510
11. Mathematical modelling of flow-induced vibrations......Page 515
11.1 The steady-current case......Page 516
11.2 The wave case......Page 522
11.3 Integrated models......Page 525
References......Page 529
APPENDIX I. Force coefficients for various cross-sectional shapes......Page 533
APPENDIX II. Hydrodynamic-mass coefficients for two- and three-dimensional bodies......Page 536
APPENDIX III. Small amplitude linear waves......Page 538
REFERENCES FOR APPENDICES......Page 540
AUTHOR INDEX......Page 541
SUBJECT INDEX......Page 546

✦ Subjects

Механика;Механика жидкостей и газов;Гидромеханика;