【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。更多还原

【Abstract】 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.更多还原