摘要
通过求解流动及悬浮物输移控制方程，提出了一种模拟沉沙池中悬浮物运动的数学模型，并采用该模型研究某典型圆形沉沙池内的流场、悬浮物浓度分布及沉淀效率。该模型基于非正交网格有限体积法，具有准确模拟沉沙池内倾斜底板、挡板等复杂边界的能力。结果表明，实际沉沙池内的流速分布及沉淀效果与理想沉沙池的假定及结论有明显差异。本数学模型可用以定量分析沉沙池几何形状的改变对沉淀效果的影响。
A mathematical model based on solving flow and sediment transport equations is presented to investigate settling and turbulent transport of suspended solids in sedimentation tanks. Due to the adoption of nonorthogonal finite volume method, the model can handle tanks with complicated geometry. Predicted velocity and concentration field and removal efficiencies of a circular tank are compared with the ideal tank theory. It has been show that with the inclusion of velocity nonuniformity and turbulent diffusion, the calculated removal efficiencies by this model differ significantly from the ideal tank theory. Results also show that this model can be used to study the effects of geometry changes on removal efficiencies in sedimentation tanks.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1998年第1期96-99,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家"八五"科技攻关项目
关键词
沉沙池
沉淀
数学模型
给水处理
sedimentation tank
removal efficiency
mathematical model
