论文部分内容阅读
采用三维、定常、不可压缩、时均N S方程和混合长湍流模型 ,建立了弯曲圆管中矿浆流动的控制方程和模型 .使用有限元法对计算区域进行了离散 ,并对流动方程进行了求解 ,为减小用有限元法计算三维湍流场的计算量而采用了加罚有限元法 .最后 ,对 180°弯曲圆管中矿浆的三维湍流场进行了数值模拟和分析 .结果表明 ,所采用的方法和模型是合理的 ,所编制的程序是正确的 ,可用于分析实际矿浆的复杂流动状态 .
The governing equation and model of the flow in the curved tube are established by using three-dimensional, steady, incompressible, time-averaged Navier-Stokes equations and mixed long turbulence model. The finite element method is used to discretize the calculated area and the flow equation is solved In order to reduce the calculation of the three-dimensional turbulent flow field calculated by the finite element method, the finite element method was adopted.Finally, the three-dimensional turbulent flow field of the slurry in the 180 ° curved tube was numerically simulated and analyzed.The results show that, The methods and models are reasonable and the programs compiled are correct and can be used to analyze the complex flow conditions of the actual pulp.