표제지
목차
Abstract 14
국문초록 16
제1장 서론 18
1.1. 연구의 배경 18
1.2. CFD 기반 수치해석모델의 발달 20
1.3. 오픈소스 코드의 등장 21
1.4. 연구의 목적 24
1.5. 연구의 구성 24
References 26
제2장 수치해석모델의 개요 30
2.1. 개요 30
2.2. 지배방정식 32
2.3. 난류모델 34
2.4. 공간이산화 36
2.5. 시간이산화 38
2.6. 자유수면의 추적 39
2.7. 파랑 조파 및 흡수기법 41
2.8. 구조물 경계처리 43
2.9. 불규칙파랑 조파기법 45
2.10. 국부세굴 46
2.10.1. 저면전단응력 46
2.10.2. 소류사 이송 47
2.10.3. 부유사 이송 49
2.10.4. Bed Morphology Model 50
2.10.5. Sand slide 50
References 52
제3장 파랑-구조물 상호작용의 해석성능 검증 58
3.1. 개요 58
3.2. 비쇄파시의 파랑-잠제 상호작용 해석 59
3.2.1. 수리모형실험 59
3.2.2. 수치해석 60
3.2.3. 해석결과 60
3.3. 쇄파시의 파랑-경사면 상호작용 해석 65
3.3.1. 수리모형실험 65
3.3.2. 수치해석 65
3.3.3. 해석결과 66
3.4. 비쇄파시의 파랑-연직원주구조물 상호작용 해석 70
3.4.1. 수리모형실험 70
3.4.2. 수치해석 71
3.4.3. 해석결과 72
3.5. 쇄파시의 파랑-연직원주구조물 상호작용 해석 77
3.5.1. 수리모형실험 77
3.5.2. 수치해석 78
3.5.3. 해석결과 78
3.6. 단파-다공성 구조물 상호작용 해석 84
3.6.1. 수리모형실험 84
3.6.2. 수치해석 84
3.6.3. 해석결과 85
3.7. 파랑-다공성 구조물 상호작용 해석 88
3.7.1. 수리모형실험 88
3.7.2. 수치해석 89
3.7.3. 해석결과 90
3.8. 파랑-연직원주구조물-해저면 상호작용 해석 95
3.8.1. 수리모형실험 95
3.8.2. 수치해석 95
3.8.3. 해석결과 97
References 99
제4장 기능성 해안구조물로의 적용 102
4.1. 개요 102
4.2. 파랑에너지 회수시스템 해석 104
4.2.1. 개요 104
4.2.2. 수리모형실험 105
4.2.3. 수치해석 107
4.2.4. 해석결과 108
4.3. 공진장치의 파랑제어 기능에 대한 해석 118
4.3.1. 개요 118
4.3.2. 수리모형실험 119
4.3.3. 수치해석 121
4.3.4. 해석결과 122
References 162
제5장 실해역 해안구조물로의 적용 164
5.1. 개요 164
5.2. 2차원 수치파동수조 166
5.2.1. 수치해석 166
5.2.2. 해석결과 170
5.3. 3차원 단면 수치파동수조 179
5.3.1. 수치해석 179
5.3.2. 해석결과 183
5.4. 3차원 부분평면 수치파동수조 193
5.4.1. 수치해석 193
5.4.2. 해석결과 197
5.5. 3차원 평면 수치파동수조 203
5.5.1. 수치해석 203
5.5.2. 해석결과 209
5.6. 구조물 인근의 지형변동 219
5.6.1. 수치해석 219
5.6.2. 해석결과 220
References 225
제6장 결론 226
Table 3.1. Wave gauge positions 89
Table 4.1. Conditions of incident waves. 107
Table 5.1. Condition of wave and cases applied to numerical analysis 169
Table 5.2. Wave height analyzed by zero-up crossing 170
Table 5.3. Comparisons of reflection·transmission coefficient and... 171
Table 5.4. Condition of wave and case applied to numerical analysis 183
Table 5.5. Comparisons of pressures and overtopping rate 185
Table 5.6. Comparisons of reflection coefficient 186
Table 5.7. Condition of wave and case applied to numerical analysis 197
Table 5.8. Averaged wave height and reduction rate of the area 198
Table 5.9. Condition of wave and case applied to numerical analysis 209
Table 5.10. Averaged wave height and reduction rate of the area 210
Table 5.11. Condition of wave and case applied to numerical analysis 220
Table 5.12. Maximum horizontal velocity 221
Fig. 2.1. Types of numerical models applied in Navier-Stokes eq. 30
Fig. 2.2. Composition of WENO stencil. 37
Fig. 2.3. Illustrations of the level set method. 39
Fig. 2.4. Illustrations of Level Set function. 40
Fig. 2.5. Illustrations of an NWT with wave generation and absorption... 42
Fig. 2.6. Illustrations of Ghost Cell Immersed Boundary. 44
Fig. 2.7. Illustrations of Sand slide process. 51
Fig. 3.1. Experimental arrangement with wave gage locations. 59
Fig. 3.2. Comparisons of free surface elevations at different wave gauges. 61
Fig. 3.3. Snapshots of the regular wave interacting with a submerged bar. 63
Fig. 3.4. Experimental arrangement with wave gage locations. 65
Fig. 3.5. Comparisons of free surface elevations at different wave gauges. 67
Fig. 3.6. Snapshots of the regular wave interacting with a slope. 68
Fig. 3.7. Experimental arrangement. 70
Fig. 3.8. Experimental arrangement with wave gage locations. 71
Fig. 3.9. Comparisons of free surface elevations at different wave gauges. 73
Fig. 3.10. Wave forces on a vertical cylinder. 74
Fig. 3.11. Comparisons of horizontal velocity at different water depth. 74
Fig. 3.12. Snapshots of free surface elevation around the vertical cylinders. 75
Fig. 3.13. Experimental arrangement with wave gage locations. 77
Fig. 3.14. Comparisons of free surface elevation and wave force. 80
Fig. 3.15. Isometric and top views of breaking wave interaction with the cylinder. 81
Fig. 3.16. Experimental arrangement. 84
Fig. 3.17. Comparisons of free surface elevation at different time. 86
Fig. 3.18. Snapshots of free surface elevation around the porous structure. 87
Fig. 3.19. Wave gauges and porous structure position. 88
Fig. 3.20. Comparisons of free surface elevations at different wave gauges. 91
Fig. 3.21. Snapshots of free surface elevation around the porous structure. 92
Fig. 3.22. Numerical Setup under waves. 96
Fig. 3.23. Flow and scour due to oscillating flow, from Palmer(1969). 97
Fig. 3.24. Experimental local scour contours, Experimental from Sumer... 98
Fig. 3.25. Numerical result local scour contours. 98
Fig. 3.26. 3D Numerical result under waves showing free surface and topography. 98
Fig. 4.1. Principle sketch of a OWC device 104
Fig. 4.2. Definition sketch of the experiment wave tank with OWC devices. 106
Fig. 4.3. Model of OWC device applied in hydraulic experiment &... 106
Fig. 4.4. 3D numerical wave tank setup. 108
Fig. 4.5. 3D solid geometry of the OWC. 108
Fig. 4.6. Comparisons of free surface elevation. 110
Fig. 4.7. Instantaneous free surface within the chamber(Case4). 111
Fig. 4.8. Comparison of the reflection coefficients for OWC device... 112
Fig. 4.9. Comparison of maximum air velocity in the air outlet between... 113
Fig. 4.10. Timeseries of the surface elevation(- black) and air velocity by... 114
Fig. 4.11. The air velocity and free surface inside the OWC device and... 116
Fig. 4.12. Arrangement of breakwater, harbor, resonator and wave gauges. 120
Fig. 4.13. Definition sketch of 3-dimensional experimental wave tank. 120
Fig. 4.14. Layout of wave gauges. 121
Fig. 4.15. 3D numerical wave tank setup. 121
Fig. 4.16. Snapshots of free surface elevation around the breakwater(Case1). 127
Fig. 4.17. Comparisons of free surface elevation around the break water(Case1). 130
Fig. 4.18. Snapshots of free surface elevation around the harbor(Case2). 131
Fig. 4.19. Comparisons of free surface elevation around the harbor(Case2). 135
Fig. 4.20. Spatial distribution of non-dimensional solitary wave height... 137
Fig. 4.21. Spatial distribution of non-dimensional solitary wave height... 139
Fig. 4.22. Snapshots of vortex flow around the breakwater. 141
Fig. 4.23. Spatial distribution of free surface elevation around breakwater. 144
Fig. 4.24. Spatial distribution of depth-averaged velocity magnitude... 145
Fig. 4.25. Spatial distribution of depth-averaged dynamic pressure around breakwater. 146
Fig. 4.26. Spatial distribution of depth-averaged vorticity magnitude... 147
Fig. 4.27. Spatial distribution of depth-averaged turbulent kinetic energy... 148
Fig. 4.28. Spatial distribution of free surface elevation around harbor. 149
Fig. 4.29. Spatial distribution of depth-averaged velocity magnitude... 150
Fig. 4.30. Spatial distribution of depth-averaged dynamic pressure around harbor. 151
Fig. 4.31. Spatial distribution of depth-averaged vorticity magnitude... 152
Fig. 4.32. Spatial distribution of depth-averaged turbulent kinetic energy... 153
Fig. 4.33. Sketch of the generation pattern for vortex. 155
Fig. 4.34. Visualization of turbulent vortical structures around the... 157
Fig. 4.35. Visualization of turbulent vortical structures around the harbor... 159
Fig. 5.1. List of numerical simulation cases. 165
Fig. 5.2. Cross-section of the breakwater. 166
Fig. 5.3. Cross-sections of representative breakwaters. 167
Fig. 5.4. Numerical wave tank arrangement. 168
Fig. 5.5. Free surface elevation time series of structure location. 170
Fig. 5.6. Comparison of target and incident frequency spectrums. 170
Fig. 5.7. Snapshots of free surface elevation and pressure around the... 173
Fig. 5.8. Snapshots of free surface elevation and pressure around the... 176
Fig. 5.9. Cross-section of the breakwater. 179
Fig. 5.10. 3D solid geometry of the breakwater. 180
Fig. 5.11. 3D numerical wave tank setup. 182
Fig. 5.12. Pressures gage locations. 185
Fig. 5.13. Pressures acting on the breakwater. 185
Fig. 5.14. Snapshots of the abnormal wave interacting with a breakwater (Case1). 187
Fig. 5.15. Snapshots of the abnormal wave interacting with a breakwater (Case2). 189
Fig. 5.16. Snapshots of the normal wave interacting with a breakwater (Case1). 191
Fig. 5.17. Snapshots of the normal wave interacting with a breakwater (Case2). 192
Fig. 5.18. Cross-section of the breakwater. 193
Fig. 5.19. 3D solid geometry of the rubble mound breakwater(Case1). 194
Fig. 5.20. 3D solid geometry of the composite caisson breakwater(Case2). 194
Fig. 5.21. 3D numerical wave tank setup. 196
Fig. 5.22. Spatial distribution of averaged wave height around the breakwater. 198
Fig. 5.23. Front snapshots of free surface elevation around the breakwater (Case1). 199
Fig. 5.24. Rear snapshots of free surface elevation around the breakwater (Case1). 200
Fig. 5.25. Front snapshots of free surface elevation around the breakwater (Case2). 201
Fig. 5.26. Rear snapshots of free surface elevation around the breakwater (Case2). 202
Fig. 5.27. Cross-section of the breakwater(Case1). 203
Fig. 5.28. Cross-section of the breakwater(Case2). 204
Fig. 5.29. Layout of the breakwater(Case1). 205
Fig. 5.30. 3D solid geometry of the breakwater. 206
Fig. 5.31. Sea bottom topography. 208
Fig. 5.32. 3D numerical wave tank setup. 208
Fig. 5.33. Area of analysis. 210
Fig. 5.34. Spatial distribution of averaged wave height around the breakwater. 211
Fig. 5.35. Spatial distribution of changed wave height around the... 212
Fig. 5.36. Snapshots of free surface elevation around the breakwater (Case1). 213
Fig. 5.37. Snapshots of free surface elevation around the breakwater (Case2). 216
Fig. 5.38. Cross-section of the breakwater(Case1). 219
Fig. 5.39. 3D numerical wave tank setup. 220
Fig. 5.40. Points of analysis. 221
Fig. 5.41. Comparisons of horizontal velocity at different points. 221
Fig. 5.42. Change in scour bed elevation. 222
Fig. 5.43. Simulated scour around the breakwater. 222
Fig. 5.44. Snapshots of free surface elevation around the breakwater. 223