论文部分内容阅读
研究了天然水沙条件下,变密度紊流在一般曲线坐标系中的基本方程和边界条件;运用三维有限分析法的新27点格式和不均匀床沙的起动流速公式,计算了浮运沉井施工期河床的冲刷情况。计算表明,以上方法在水沙两相流局部边界复杂的三维计算中具有较好的精度和适应性。
The basic equations and boundary conditions of variable density turbulence in a general curvilinear coordinate system under natural water and sediment conditions are studied. By using the new 27-point finite element analysis method and the non-uniform bed velocity formula, Well bed erosion during construction. The calculation shows that the above method has better accuracy and adaptability in the complex three-dimensional calculation of the local boundary of water and sediment flow.