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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 羅弘岳(Hong-Yueh Lo) | |
dc.contributor.author | Rong-lian Kuo | en |
dc.contributor.author | 郭榮煉 | zh_TW |
dc.date.accessioned | 2021-06-17T09:10:30Z | - |
dc.date.available | 2021-02-22 | |
dc.date.copyright | 2021-02-22 | |
dc.date.issued | 2021 | |
dc.date.submitted | 2021-02-05 | |
dc.identifier.citation | Dalrymple, R. A., Liu, P. L. F. (1978). Waves over soft muds: a two-layer fluid model. Journal of Physical Oceanography, 8(6), 1121-1131. Gade, H. G. (1958). Effects of a nonrigid, impermeable bottom on plane surface waves in shallow water. Journal of Marine Research, 16, 61-81. Grimshaw, R. (1970). The solitary wave in water of variable depth. Journal of Fluid Mechanics, 42(3), 639-656. Greenshields, C. J. (2015). OpenFOAM Programmers Guide. OpenFOAM Foundation Ltd. Version 3.0. Greenshields, C. J. (2019). The OpenFOAM Foundation User Guide 7.0. The OpenFOAM Foundation Ltd: London, United Kingdom, 10th July. Higuera Caubilla, P. (2015). Aplicación de la dinámica de fluidos computacional a la acción del oleaje sobre estructuras. Application of computational fluid dynamics to wave action on structures (Doctoral dissertation, Universidad de Cantabria). Hirt, C. W., Nichols, B. D. (1981). Volume of fluid (VOF) method for the dynamics of free boundaries. Journal of Computational Physics, 39(1), 201-225. Healy, T., Wang, Y., Healy, J. A. (Eds.). (2002). Muddy coasts of the world: processes, deposits and function. Elsevier. Isaacson, M. D. S. Q. (1983). Solitary wave diffraction around large cylinder. Journal of Waterway, Port, Coastal, and Ocean Engineering, 109(1), 121-127. Keulegan, G. H. (1940). Mathematical theory of irrotational translation waves. J. Res. Natl. Bur. Stand., 24, 47-101. Keller, J. B. (1948). The solitary wave and periodic waves in shallow water. Communications on Pure and Applied Mathematics, 1(4), 323-339. Laitone, E. V. (1960). The second approximation to cnoidal and solitary waves. Journal of Fluid Mechanics, 9(3), 430-444. Liu, P. L., Chan, I. C. (2007). On long-wave propagation over a fluid-mud seabed. Journal of Fluid Mechanics, 579, 467. McCowan, J. (1891). VII. On the solitary wave. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 32(194), 45-58. Mo, W., Irschik, K., Oumeraci, H., Liu, P. L. F. (2007). A 3D numerical model for computing non-breaking wave forces on slender piles. Journal of Engineering Mathematics, 58(1-4), 19-30. Park, Y. S., Liu, P. L., Clark, S. J. (2008). Viscous flows in a muddy seabed induced by a solitary wave. Journal of Fluid Mechanics, 598, 383. Rayleigh, L. (1876). On waves. Phil. Mag., 1, 257-259. Ramírez, L., Fraile, D., Brindley, G. (2020). Offshore wind in Europe: Key trends and statistics 2019. Schindler, R. J., Stripling, S., Whitehouse, R. J. S., Harris, J. M. (2016, October). The influence of physical cohesion on scour around a monopile. In Scour and Erosion, Proc. 8th Int. Conf. on Scour and Erosion (pp. 325-334). Sumer, B. M., Whitehouse, R. J., Tørum, A. (2001). Scour around coastal structures: a summary of recent research. Coastal Engineering, 44(2), 153-190. Tonkin, S., Yeh, H., Kato, F., Sato, S. (2003). Tsunami scour around a cylinder. Journal of Fluid Mechanics, 496, 165. Wang, K. H., Wu, T. Y., Yates, G. T. (1992). Three-dimensional scattering of solitary waves by vertical cylinder. Journal of Waterway, Port, Coastal, and Ocean Engineering, 118(5), 551-566. Yates, G. T., Wang, K. H. (1994, January). Solitary wave scattering by a vertical cylinder: experimental study. In The Fourth International Offshore and Polar Engineering Conference. International Society of Offshore and Polar Engineers. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/74927 | - |
dc.description.abstract | 本文進行泥床海域孤立波作用下直立圓柱周圍的水動力特性研究。基於開源數值模擬軟體OpenFOAM,建立三維數值波浪水槽,水槽中同時存在空氣、水、泥三種黏性流體以及圓柱結構物。研究表明,泥面的變化雖然是孤立波傳播導致的,但其起伏運動與水面不太相同,有其特殊性:在孤立波通過整個泥床的過程中,圓柱迎流側泥面先上升再下降形成低谷區,隨著時間推進低谷區逐漸以圓弧狀包圍在圓柱周圍,而圓柱兩側泥面則持續爬升,圓柱背流側泥面則形成逐漸變大的近似橢圓形低谷區。研究發現,圓柱周圍泥水交界面以上一定範圍內出現了回流的現象,而水面高度的變化是導致壓力梯度變化的主要因素,逆壓梯度則是導致回流出現的主要因素。研究還發現,泥床的存在雖然會使孤立波波高衰減、直立圓柱上的波浪溯升降低,但是卻使得作用於圓柱的總水平波浪力增大。這些研究結果,在一定程度上,可為離岸風力發電及其他海洋工程的規劃設計提供參考。 | zh_TW |
dc.description.abstract | In this paper, the hydrodynamic characteristics around a vertical cylinder under solitary wave action in mud-bed sea area are studied. Based on the open source software OpenFOAM, a three-dimensional numerical wave water tank is established, in which there are three kinds of viscous fluids including air, water, and mud and a cylindrical structure. Investigations have shown that although the variation of the mud surface elevation is caused by the propagation of solitary waves, its undulating motion is not the same as that of the water surface. There are some special phenomena: in the process of solitary wave passing through the entire mud bed, the mud surface on the upwind side of the cylinder rises first and then falls to forms a trough area. As time progresses, the trough area gradually surrounds the cylinder in an arc shape, and the mud surface on both sides of the cylinder continues to climb, and the mud surface on the downwind side of the cylinder forms an approximately elliptical trough area that gradually becomes larger. The study found that there is reverse flow in a certain range above the mud-water interface around the cylinder. Furthermore, the change of water surface elevation is the main factor leading to the change of pressure gradient, and the reverse pressure gradient is the principal reason that causes the emergence of reverse flow. The study also found that the presence of the mud bed can attenuate the solitary wave height and reduce the wave run-up around the cylinder, but it increases the total horizontal wave forces acting on the cylinder. These research results, to a certain extent, can provide references for the planning and design of offshore wind power projects and other offshore structures. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T09:10:30Z (GMT). No. of bitstreams: 1 U0001-3101202117331500.pdf: 4845723 bytes, checksum: 14132d39996ea39cd0857fbb8d8c9a14 (MD5) Previous issue date: 2021 | en |
dc.description.tableofcontents | 口試委員會審定書 i 摘要 ii Abstract iii 第一章 緒論 1 1.1研究背景及意義 1 1.2相關研究回顧 2 1.3研究動機與目的 3 1.4研究方法與主要內容 4 第二章 基於OpenFOAM的數學模型 6 2.1孤立波理論簡介 7 2.2自由液面的模擬 8 2.3控制方程 9 2.4初始條件和邊界條件 9 2.5數值離散過程與求解 11 2.5.1空間域離散與時間域離散 11 2.5.2流場的求解 13 2.6本章小結 15 第三章 數值波浪水槽構建與驗證 16 3.1孤立波過淤泥泥床的數值模擬與驗證 16 3.1.1模型設置 16 3.1.2模型驗證 18 3.2孤立波與圓柱作用的數值模擬與驗證 21 3.2.1模型設置 22 3.2.2模型驗證 24 3.3本章小結 25 第四章 泥床海域孤立波作用下直立圓柱周圍的水動力特性研究 26 4.1問題的初探 26 4.1.1實驗設置 26 4.1.2模型設置 27 4.1.3造波及收斂性驗證 30 4.1.4初步研究概括 32 4.1.4.1自由液面與泥面的變化 32 4.1.4.2流速分佈 34 4.1.4.3波浪力 37 4.2回流 38 4.2.1概述 38 4.2.2計算結果分析 39 4.2.2.1圓柱對水面、泥面、壓力梯度與回流的影響 39 4.2.2.2水面高程、壓力梯度與回流的關係 46 4.3直立圓柱的受力 49 4.3.1概述 49 4.3.2計算結果分析 50 4.4本章小結 57 4.4.1問題的初探 57 4.4.2回流 57 4.4.3直立圓柱的受力 58 第五章 結論與展望 59 5.1主要結論 59 5.2創新點 60 5.3展望 60 參考文獻 62 | |
dc.language.iso | zh-TW | |
dc.title | 孤立波對泥質海床上直立式圓柱作用的數值研究 | zh_TW |
dc.title | Numerical Study of a Solitary Wave Interacting with a Vertical Cylinder over a Muddy Seabed | en |
dc.type | Thesis | |
dc.date.schoolyear | 109-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 蔡武廷(Wu-ting Tsai),詹益齊(I-Chi Chan) | |
dc.subject.keyword | 孤立波,直立圓柱,泥床,波浪力,回流,OpenFOAM, | zh_TW |
dc.subject.keyword | Solitary wave,Vertical cylinder,Mud bed,Wave forces,Reverse flow,OpenFOAM, | en |
dc.relation.page | 63 | |
dc.identifier.doi | 10.6342/NTU202100296 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2021-02-07 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
顯示於系所單位: | 工程科學及海洋工程學系 |
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