摘要
基于N-S方程和泥沙输运方程,采用k-ε模型和SGS涡黏性模型为紊流传输模型;利用有限差分法进行求解,模拟的结果同Mao的试验值吻合良好。对不同管径影响的冲淤情况和流动结构做进一步模拟分析,得到了局部冲刷公式。k-ε模型和SGS模型的模拟结果表明,k-ε模型对于剪切应力的预测更具优越性。
The numerical model is based on the finite difference method of the Navier-Stokes equations and sediment transportation equations with the standard k-εan-d Smagorinsky＇ s subgrid scale （SGS） turbulence models.The calculated results agree well with Mao＇ s experimental data.Furthermore,erosion and deposition conditions and flow structures under different diameters were intensively investigated,and a local scour formula was obtained.k-ε model and SGS model results showed that k-ε model reflect its superiority on the shear stress.
出处
《科学技术与工程》
北大核心
2015年第1期8-17,共10页
Science Technology and Engineering
基金
天津大学水利工程仿真与安全国家重点实验室开放基金资助项目(HESS-1401)
国家自然科学基金项目(51279124)
国家海洋局南海分局海洋科学技术局长基金项目(1417)资助
