180°弯曲方管牛顿流体及一种非牛顿流体湍性流动的数值模拟

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The Numerical Simulation of Turbulent Flows of Newtonian and a Sort of Non-Newtonian Fluid in 180-Degree Square Sectioned Bend

摘要: 运用湍流k-ε模式及实测壁面函数分别模拟牛顿流体(清水)及一种非牛顿流体(聚合物稀薄减阻溶液)流经180°弯曲方管的湍性流动,取得与实测速度分布吻合较好的结果.对于湍流模式对存在大涡的复杂流动的适应性,根据计算和试验结果进行了分析和讨论.
- 湍流 /
- 牛顿流体 /
- 数值模拟
Abstract: Using k-ε model of turbulence and measured wall functions, turbulent flows of Newtonian (pure water) andasort of non-Newtonian fluid (dilute, drag-reduction solution of polymer) in a 180-degree curved bend were simulated numerically. The calculated results agreed well with the measured velocity profiles. On the basis of calculation and measurement, appropriateness of turbulence model to complicated flow in which the large-scale vortex exists was analyzed and discussed.
- turbulent flows /
- Newtonian fluid /
- numerical simulation

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