跳到主要內容

簡易檢索 / 詳目顯示

回結果列表
研究生： 達魯
Daru Nurisma Pramukti
論文名稱： 以大渦模擬潰壩波與孔隙結構之交互作用
Large Eddy Simulation of Dambreak Flows through Porous Obstacles
指導教授： 朱佳仁
Alwafi Pujiraharjo
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 土木工程學系
Department of Civil Engineering
論文出版年： 2017
畢業學年度： 105
語文別： 中文
論文頁數： 97
中文關鍵詞： 潰壩流 、多孔障礙物 、大渦模擬 、水槽實驗
外文關鍵詞： Dambreak flow, Porous obstacles, Large Eddy Simulation, Water flume experiment
相關次數： 點閱：15  下載：0 
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報

    • 水利工程師對潰壩洪水的預測非常感興趣，這類極端事件中水位和速度的變化是防洪控制的重要參數。從前的研究大多數使用水槽實驗和二維淺水方程來研究洪水波在平滑通道或通過不可滲透障礙物。本研究使用三維數值模型和水槽實驗來研究潰壩波與孔隙結構之交互作用。通過大渦模擬（LES）模型模擬周圍之自由水面及流場之流動情形，並通過流體體積 (VOF）方法來計算水面的變化。多孔障礙物對水流的影響由多孔阻力模型模擬。並通過波高計和數位照相機測量水表面高度等實驗數據的比較來證明模式本身的可信度與準確度。待驗證成功後，本模式即可被用於研究孔隙結構物對潰壩流的影響。數值結果表明，多孔隙阻力模型可以用於模擬多孔障礙物的阻力。

    The prediction of dambreak floods is of great interest to hydraulic engineers. Variations of water level and velocity in these extreme events are important parameters for the design of hydraulic systems and for flood control. Most of the previous studies used flume experiments and two-dimensional shallow water equations to investigate the flood waves over smooth channels or through impermeable obstacles. This study uses a three-dimensional numerical model and flume experiments to investigate dambreak flows through porous obstacles on the channel bed. The flow motion was simulated by a Large Eddy Simulation (LES) model, and the variation of water surface was solved by the Volume of Fluid (VOF) method. The effect of porous obstacles to the water flows was simulated by the a porous drag model. The variation of water surface in the water flume was measured by a wave gauge and a digital camera. The simulated water surface was validated by the measured surface elevation. Furthermore, the verified numerical model was then used to study the influences of the porosity of obstacles to the dambreak flows. Numerical results reveal that the resistance of the porous obstacle can be simulated by a porous drag model.

    摘要 i Abstract ii Acknowledgement iii Table of Contents iv Notation v Figure captions vi Table captions ix 1. Introduction 1 2. Experimental Setup 4 3.1 Governing Equations 5 3.2 Numerical Setup 7 4. Model Validation 8 4.1. Case 1 (without obstacle) 8 4.2. Case 2 (with a solid obstacle) 10 4.3 Dambreak flow through porous obstacles 11 5. Results and Discussion 14 5.1. Drag coefficient 14 6. Conclusions 15 Bibliography 17 Appendix A 59 Appendix B 81

    [1] Aureli, F., Mignosa, P. and Tomirotti, M. (2000) Numerical simulation and experimental verification of dam-break flows with shocks, J. of Hydraulic Research, Vol. 38, No. 3, 197-206.
    [2] Aureli, F., Maranzoni, A, Mignosa P., Ziveri, C. (2008) Dam-break flows: acquisition of experimental data through an imaging technique and 2D numerical modeling, J. of Hydraulic Eng., Vol. 134, No. 8, 197-206.
    [3] Bell, S.W., Elliot, R.C. and Chaudhry, M. (1992) Experimental results of two-dimensional dam-break flows, J. of Hydraulic Research, Vol. 30, No. 2, 225-252.
    [4] Bellos, C.V., Soulis, V. and Sakkas, J.G. (1992) Experimental investigation of two-dimensional dam-break induced flows, J. of Hydraulic Research, Vol. 30, No. 1, 47-63.
    [5] Cagatay, H. and Kocaman, S. (2010) Dam-break flows during initial stage using SWE and RANS approaches, J. of Hydraulic Research, Vol. 48, No. 5, 603-611.
    [6] Cagatay, H. and Kocaman, S. (2011) Dam-break flow in the presence of obstacle: experimental and CFD simulation, J. of Hydraulic Research, Vol. 5, No. 4, 541-552.
    [7] Chanson, H. (2009) Application of the method of characteristics to the dam break wave problem, J. of Hydraulic Research, Vol. 47, No. 1, 41-49.
    [8] Chu, C.-R., Chung, C.-H., Wu, T.-R., Wang, C.-Y. (2016) Numerical simulation of hydrodynamic loading on fully submerged bridge decks, J. of Hydraulic Eng. ASCE. 143, 10.1061/(ASCE)HY.1943-7900.0001177.
    [9] Eaket J., Hicks, F. and Peterson, A. (2005) Use of stereoscopy for Dam Break flow measurement. J. of Hydraulic Eng. ASCE. 10.1061/(ASCE) 0733-9429 (2005) 131:1 (24), 24-29.
    [10] Elliot, R.C. and Chaudhry, M. (1992) A wave propagation model for two-dimensional dam-break flows, J. of Hydraulic Research, Vol. 30, No. 4, 467-483.
    [11] Hu, K.-C., Hsiao, S.-C., Hwung, H.-H. and Wu, T.-R. (2012) Three-dimensional numerical modeling of the interaction of dam-break waves and porous media, Advances in Water Resources, No. 47 (2012), 14-30.
    [12] Hu et al. (2014) Laboratory study on wave dissipation by vegetation in combined current-wave flow, Coastal Engineering, No. 88, 131 – 142.
    18
    [13] Hunt, B. (1987) An inviscid dam-break solution, J. of Hydraulic Research, Vol. 25, No. 3, 313-327.
    [14] Larocque, L.A., Imran, J. and Chaudhry, M. (2013) 3D numerical simulation of partial breach dam-break flow using the LES and k-ε turbulence models, J. of Hydraulic Research, Vol. 51, No. 2, 145-157.
    [15] Li, C.W. and Wang, J.H. (2002) Large Eddy Simulation of dispersion in free surface shear flow, J. of Hydraulic Research, Vol. 40, No. 3, 351-358.
    [16] Lin, G.-F., Lai, J.-S. and Guo, W.-D. (2005) High-resolution TVD schemes in finite volume method for hydraulic shock wave modeling, J. of Hydraulic Research, Vol. 43, No. 4, 376-389.
    [17] Miller, S., and Chaudhry, M.H. (1989) Dam-break flows in curved channel. J. Hydraulics Eng. 115(11), 1465-1478.
    [18] Ritter A., (1992) Die Fortplanzung der Wasserwellen, Zeitschriftdes Vereines Deutscher Ingeniere, 36(33), 947-954.
    [19] Soares-Frazao, S. (2007) Experiments of dam-break wave over a triangular bottom sill, J. of Hydraulic Research, Vol. 45, No. 1, 19-26.
    [20] Soares-Frazao, S. and Zech, Y. (2007) Experimental study of dam-break flow against an isolated obstacle, J. of Hydraulic Research, Vol. 345 No. 1, 27-36.
    [21] Soares-Frazao, S. and Zech, Y. (2008) Dam-break flow through an idealized city, J. of Hydraulic Research, Vol. 46, No. 5, 648-658.
    [22] Stansby, P.K., et al. (1998) The initial stages of dam-break flow. J. Fluid Mech. 374, 407-424.
    [23] Stoesser, T. (2014) Large-eddy simulation in hydraulics: Quo Vadis?, J. of Hydraulic Research, Vol. 52, No. 4, 441-452.
    [24] Tseng, M.H., Hsu, C.A. and Chu, C.-R. (2001) Channel routing in open-channel flows with surges, J. of Hydraulic Eng., ASCE, Vol. 127, No. 2, 115-122.
    [25] Tseng, M.H. and Chu, C.-R. (2000) Simulation of dam-break flows by an improved Predictor-Corrector TVD Scheme, Advances in Water Resources, No. 23 (6), 637-643.
    19
    [26] Tseng, M.H. and Chu, C.-R. (2000) Two-dimensional shallow water flows simulation using TVD-MacCormack scheme, J. of Hydraulic Research, Vol. 38, No. 2, 123-131.
    [27] Wu, Y.-T, Hsiao, S.-C. (2013) Propagation of solitary waves over a submerged permeable breakwater, Coastal Engineering, No. 81, 1 – 18.
    [28] Wu, T-R., Chu, C.-R., Huang, C.-J., Wang, C.-Y., Chien, S.-Y. Chen M.-Z. (2014) A two-way coupled simulation of moving solids in free-surface flows, Computers and Fluids. Vol.100, 347-355.
    [29] Xie, Z., Lin, B., Falconner, R.A. and Maddux, T.B. (2013) Large-eddy simulation of turbulent open-channel flow over three-dimensional dunes, J. of Hydraulic Research, Vol. 51, No.52, 494-505.
    [30] Yang, C. Lin, B., Jiang, C. and Liu, Y. (2010) Predicting near-field dam-break flow and impact force using a 3D model, J. of Hydraulic Research, Vol. 48, No. 6, 784-792.

    QR CODE
    :::