三维悬沙模型及河岸边界追踪方法Ⅱ-河岸边界追踪
|
摘要
提出了一种在河岸后退过程中追踪不规则动边界的方法,其中心思想是当河岸单元临水边侧壁在水力冲刷、崩塌作用下后退时,记录其侵蚀状态;当后退至一定程度后,在该河岸单元的临水边侧生成一个能反映真实边界的亚单元,赋予它湿单元标志并使其参与水、沙模型计算,进而反映边界变化对输水输沙的影响。通过丁坝挑流、潮沟冲刷两个算例的检验,结果表明该方法是有效的。
A method for tracking moveable irregular river bank is proposed in this paper.The main idea is to record and simulate the bank retrogradation caused by flow scouring and bank falling.When the retrogradation reaches a certain threshold,a new sub-element is created next to the boundary element to represent the actual boundary,and in next step this new sub-element that is labeled with the wet flag will be calculated to take the influence of boundary move on the flow and sediment transport.The new method is validated by two test cases of flow around a spur-bar and a flow scouring channel experiment.
A method for tracking moveable irregular river bank is proposed in this paper.The main idea is to record and simulate the bank retrogradation caused by flow scouring and bank falling.When the retrogradation reaches a certain threshold,a new sub-element is created next to the boundary element to represent the actual boundary,and in next step this new sub-element that is labeled with the wet flag will be calculated to take the influence of boundary move on the flow and sediment transport.The new method is validated by two test cases of flow around a spur-bar and a flow scouring channel experiment.
引文
①张红武,张羽,胡德超等.曹娥江大闸闸下冲刷模型试验报告.北京:清华大学黄河研究中心,2005
[1]ASCE task committee on hydraulic,bank mechanics,and modeling of riverbank width adjustment.River width adjustment II:modeling[J].ASCE,Journal of Hydraulic Engineering,1998,124(9):903～918.
[2]Duan J G,Wang S Y.The applications of the enhanced CCHE 2D model to study the alluvial channel migration processes[J].Journal of Hydraulic Research,2001,39(4):469～780.
[3]夏军强,王光谦,吴保生.游荡型河流演变及其数值模拟[M].北京:中国水利水电出版社,2005,121～135.XIA Junqiang,WANG Guangqian,WU Baosheng.Numerical simulation for the longitudinal and lateral deformation of riverbed in awondering river[M].Beijing:The Water Publishing Company of Chinese,2005,121～135.(in Chinese)
[4]JIA Dongdong,SHAO Xuejun,WANG Hong,ZHOU Gang.Locally-adaptive grid system for 3D numerical simulation of meandermigration[A].16th IAHR-APD Congress and 3rd IAHR-ISHS[C].Beijing:Tsinghua University Pres,2008:877～882.
[5]王光谦,钟德钰,张红武,等.汶川地震唐家山堰塞湖泄流过程的数值模拟[J].科学通报,2008,53(1):1～7.WANG Guangqian,ZHONG Deyu,ZHANG Hongwu,et al.The numerical simulation of flood discharge of the earthquake-formedlandslide lake of Tangjia mountain in Wenchuan[J].China Science Bulletin,2008,53(1):1～7.(in Chinese)
[6]Osman A M,Thorne C R.Riverbank stability analysisⅠ:Theory[J].Journal of Hydraulic Engineering-ASCE,1988,114(2):134～150.
[7]俞月阳,唐子文,等.曹娥江船闸引航道冲淤研究[J].泥沙研究,2007,3:17～23.YU Yueyang,TANG Ziwen,et al.Siltation in the lock approach of the Cao'e river[J].Journey of Sediment Research,2007,3:17～23.(in Chinese)
[8]张红武,江恩惠,等.黄河高含沙洪水模型的相似率[M].河南:河南科学技术出版社,1993,67～71.ZHANG Hongwu,JIANG Enhui,et al.The similarity laws of the hyper-concentration sediment-laden flows in the Yellow River[M].Henan:The science and technology publishing company of Henan,1993,67～71.(in Chinese)
[1]ASCE task committee on hydraulic,bank mechanics,and modeling of riverbank width adjustment.River width adjustment II:modeling[J].ASCE,Journal of Hydraulic Engineering,1998,124(9):903～918.
[2]Duan J G,Wang S Y.The applications of the enhanced CCHE 2D model to study the alluvial channel migration processes[J].Journal of Hydraulic Research,2001,39(4):469～780.
[3]夏军强,王光谦,吴保生.游荡型河流演变及其数值模拟[M].北京:中国水利水电出版社,2005,121～135.XIA Junqiang,WANG Guangqian,WU Baosheng.Numerical simulation for the longitudinal and lateral deformation of riverbed in awondering river[M].Beijing:The Water Publishing Company of Chinese,2005,121～135.(in Chinese)
[4]JIA Dongdong,SHAO Xuejun,WANG Hong,ZHOU Gang.Locally-adaptive grid system for 3D numerical simulation of meandermigration[A].16th IAHR-APD Congress and 3rd IAHR-ISHS[C].Beijing:Tsinghua University Pres,2008:877～882.
[5]王光谦,钟德钰,张红武,等.汶川地震唐家山堰塞湖泄流过程的数值模拟[J].科学通报,2008,53(1):1～7.WANG Guangqian,ZHONG Deyu,ZHANG Hongwu,et al.The numerical simulation of flood discharge of the earthquake-formedlandslide lake of Tangjia mountain in Wenchuan[J].China Science Bulletin,2008,53(1):1～7.(in Chinese)
[6]Osman A M,Thorne C R.Riverbank stability analysisⅠ:Theory[J].Journal of Hydraulic Engineering-ASCE,1988,114(2):134～150.
[7]俞月阳,唐子文,等.曹娥江船闸引航道冲淤研究[J].泥沙研究,2007,3:17～23.YU Yueyang,TANG Ziwen,et al.Siltation in the lock approach of the Cao'e river[J].Journey of Sediment Research,2007,3:17～23.(in Chinese)
[8]张红武,江恩惠,等.黄河高含沙洪水模型的相似率[M].河南:河南科学技术出版社,1993,67～71.ZHANG Hongwu,JIANG Enhui,et al.The similarity laws of the hyper-concentration sediment-laden flows in the Yellow River[M].Henan:The science and technology publishing company of Henan,1993,67～71.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心