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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 張倉榮 | |
dc.contributor.author | Chia-Ming Chang | en |
dc.contributor.author | 張家銘 | zh_TW |
dc.date.accessioned | 2021-05-20T20:17:36Z | - |
dc.date.available | 2011-08-19 | |
dc.date.available | 2021-05-20T20:17:36Z | - |
dc.date.copyright | 2011-08-19 | |
dc.date.issued | 2011 | |
dc.date.submitted | 2011-08-11 | |
dc.identifier.citation | 1. 朱佳仁,2003,「環境流體力學」,科技圖書。
2. 謝怡芳,2004。「三維度紊流大渦模擬在多區間建築物室內環境風場之應用研究」,國立台灣大學生物環境系統工程學研究所碩士論文。 3. 林玫珊,2005。「計算生態流體力學在三維度自由液面植栽帶流場之應用研究」,國立台灣大學生物環境系統工程學研究所碩士論文。 4. 陳均美,2006。「人工濕地對懸浮固體排除機制之數值模擬」,國立台灣大學生物環境系統工程學研究所碩士論文。 5. 顧可欣,2007。「三維度魚道水理及魚體行進能力之數值模擬研究」,國立台灣大學生物環境系統工程學研究所碩士論文。 6. 石武融,2007。「透水性筐網圓柱之流場試驗研究」,國立成功大學水利及海洋工程研究所碩士論文。 7. 黃婉筑,2007。「明渠通過孔隙方塊之三維流場模擬分析」,國立成功大學水利及海洋工程研究所碩士論文。 8. 梁景俊,2009。「透水性筐網圓柱群之流場試驗研究」,國立成功大學水利及海洋工程研究所碩士論文。 9. 許少華,經濟部水利署水利規劃試驗所,2010。「研發透水性結構物以防治河岸沖刷之實驗與數值模擬」,台中市。 10. Ahmed, F. and Rajaratnam, N., 1998. “Flow around Bridge Piers”. J. of Hydraulic Engineering, 124(3): 288-300. 11. Bhattacharyyaa, S. and Dhinakarana, S., Khalilib, A., 2006. “Fluid Motion Around and Through a Porous Cylinder”. J. of Chemical Engineering Science, 61: 4451-4461. 12. Chan, E.C. and Lien, F.S., 2005. “Permeability Effects of Turbulent Flow Through a Porous Insert in a Backward-Facing-Step Channel”. J. of Transport Porous Media, 59: 47-71. 13. Dalpe, B. and Masson, C., 2009. “Numerical Simulation of Wind Flow near a Forest Edge”. J. of Wind Engineering and Industrial Aerodynamics, 97: 228-241. 14. Dong, Z., Luo, W., Qian, G., Lu, P., Wang, H., 2007. “A wind tunnel simulation of the mean velocity fields behind upright porous fences”. J. of Arid Environments, 74: 193–207. 15. Fluent, 2003. “FLUENT 6.1 User’s Guide”. Fluen. 16. Franssona, J.H.M., Koniecznyb, P., Alfredssona, P.H., 2004. “Flow around a Porous Cylinder Subject to Continuous Suction or Blowing”. J. of Fluids and Structures, 19: 1031-1048. 17. Jue, T.C., 2004. “Numerical Analysis of Vortex Shedding Behind a Porous Square Cylinder”. J. of Numerical Methods for Heat & Fluid Flow, 14(5): 649–663. 18. Launder, B.E. and Spalding, D.B. 1974. “The Numerical Computation of Turbulent Flows”. Computer Methods in Applied Mechanics and Engineering, 3:269-289, 19. Laws, E.M. and Livesey, J.L., 1978. “Flow through Screen”. Annual Review of Fluid Mechanics, 10: 247-266. 20. Pinker, R.A. and Herbert, M. V., 1967. “Pressure Loss Associated With Compressible Flow Through Square-Mesh Wire Gauzes”. J. of Mechanical Engineering Science, 9(1): 11-23. 21. Rahman, M.M., Karim, M.M., Alim, M.A., 2007. “Numerical Investigation of Unsteady Flow past a Circular Cylinder Using 2-D Finite Volume Method”. J. of Naval Architecture and Marine Engineering, 4: 27–42. 22. Reynolds, J., 1969. “Flow Deflection by Gauze Screens”. J. of Mechanical Engineering Science, 11(3): 290-294. 23. Salaheldin, T.M., Imran, J., Chaudhry, M.H., 2004. “Numerical Modeling of Three-Dimensional Flow Field around Circular Piers”. J. of Hydraulic Engineering, 130(2) : 91–100. 24. Santiago, J.L., Martı′n, F., Cuerva, A., Bezdenejnykh, N., Sanz-Andre′s, A., 2007. “Experimental and Numerical Study of Wind Flow behind Windbreaks”. J. of Atmospheric Environment, 41: 6406–6420. 25. Sobera, M.P. and Kleijn, C.R., 2008. “T-RANS Simulations of Subcritical Flow with Heat Transfer past a Circular Cylinder Surrounded by a Thin Porous Layer”. J. of Flow Turbulence Combust, 80: 531-546. 26. Versteeg, H.K. and Malalasekera, W., 2007. “An Introduction to Computational Fluid Dynamic: The Finite Volume Method (2nd Edition)”. England: Pearson Education. 27. Wilson, J.D., 1985. “Numerical Studies of Flow through a Windbreak”. J. of Wind Engineering and Industrial Aerodynamics, 21: 119-154. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/9324 | - |
dc.description.abstract | 本研究主要為探討三維自由液面流場受到筐網圓柱之影響。首先,以k–ε標準紊流模式搭配體積分率法進行單根筐網圓柱之流場模擬,並利用孔隙介質流模式計算水體流經筐網圓柱時所受到的阻滯效應。經由模擬結果與物理試驗結果之比較,發現兩者趨勢頗為一致,顯示數值模擬在單根筐網圓柱之流場變化上具有一定程度的準確性。接著,在相同入流流況與相同圓柱直徑的情境下,本研究進行多組不同孔隙率的流場模擬,並定義臨界壓力去估算出不同孔隙率的筐網圓柱後方的保護範圍。我們將擁有最大保護範圍之孔隙率稱為最佳孔隙率,經由模擬結果發現最佳孔隙率會位於孔隙率0.43左右。
最後,將單根筐網圓柱案例擴展到單排筐網圓柱之案例,我們進行單排實心圓柱與單排筐網圓柱之流場比較,以及不同根數的筐網圓柱對於流場之影響。由模擬結果得知,實心圓柱的阻水效應大,圓柱後方的流速分佈紊亂,相反的,筐網圓柱後方的流速分佈卻十分穩定,顯示筐網圓柱比實心圓柱更能穩定流場。比較不同筐網圓柱根數的流場變化發現,根數越多之流場,後方的低速區範圍有明顯增大之趨勢。 | zh_TW |
dc.description.abstract | The main objective of this research is to investigate the effect of porous cylinders on flow patterns. The standard k–ε turbulence model and the volume of fluid method (VOF) are used to simulate 3-D free surface flows. The resistant force generated by porous cylinders is performed by porous media theory. The computed results are verified by the available experimental data and are in consistent with the experiment data. In addition, we are concerned with how a large area is protected behind the porous cylinder, so a critical pressure is defined to estimate the protection area. Through several kinds of porosity are used in simulations, it is found that there is the largest protection area when the porosity is around 0.43. Thus, we call it as the optimal porosity in this study.
Finally, we apply our model to flows past two kinds of singled-row cylinders, porous cylinders and solid cylinders. From the numerical results, we can conclude that flows past porous cylinders are more stable than those past solid cylinders. The number of cylinders is in proportional to their protection area. | en |
dc.description.provenance | Made available in DSpace on 2021-05-20T20:17:36Z (GMT). No. of bitstreams: 1 ntu-100-R98622018-1.pdf: 1743481 bytes, checksum: 1745d9b397944848de151fab1f2003d3 (MD5) Previous issue date: 2011 | en |
dc.description.tableofcontents | 謝誌 2
摘要 I Abstract II 目錄 III 表目錄 V 圖目錄 VI 符號對照表 IX 第一章 緒論 1 1.1前言 1 1.2研究目的 2 1.3文獻回顧 2 第二章 理論模式 5 2.1流場控制方程式 5 2.2紊流模式k–ε 6 2.3邊牆函數 7 2.4孔隙介質流模式 8 2.5體積分率法 9 第三章 數值方法 12 3.1數值模擬架構 12 3.2有限體積法 12 3.3控制方程式的離散 13 3.4收斂條件 14 3.5邊界條件設定 14 第四章 模式驗證 18 4.1實心圓柱驗證 18 4.2孔隙圓柱驗證 20 4.3驗證結果與討論 21 4.4孔隙區域與孔隙跳躍之比較 22 第五章 模式應用 42 5.1最佳孔隙率的探討 42 5.2單排圓柱的探討 44 5.2.1不同根數之筐網圓柱的流場流速分佈比較 45 5.2.2筐網圓柱與實心圓柱的流場流速分佈比較 46 第六章 結論與建議 64 6.1結論 64 6.2建議 65 參考文獻 66 | |
dc.language.iso | zh-TW | |
dc.title | 孔隙消能結構物之三維度流場數值研析 | zh_TW |
dc.title | Numerical Investigation of 3D Flows over
Energy-Dissipation Porous Media | en |
dc.type | Thesis | |
dc.date.schoolyear | 99-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 許少華,陳明志,葉克家,賴進松 | |
dc.subject.keyword | 筐網圓柱,最佳孔隙率,單排多根圓柱,k–ε標準紊流模式,體積分率法,孔隙介質, | zh_TW |
dc.subject.keyword | Porous cylinder,Best porosity,Single-row cylinder,Standard k–ε turbulence model,Volume of Fluid,Porous media, | en |
dc.relation.page | 69 | |
dc.rights.note | 同意授權(全球公開) | |
dc.date.accepted | 2011-08-12 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 生物環境系統工程學研究所 | zh_TW |
顯示於系所單位: | 生物環境系統工程學系 |
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