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首页> 外文会议>International Conference on Electrical and Control Engineering >Unsteady Mixing Performance in Single Screw Extruders
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Unsteady Mixing Performance in Single Screw Extruders

机译：单螺杆挤出机的不稳定混合性能

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The dimensionless control equations of three dimensional flow in single screw extruders is developed in terms of velocity and vertorcity, and then a new method for solving the Non-newtionian flow is presented without solving pressure equation. The simulation concerns the incompressible fluid obeying power law properties and the application of finite volume method to the geometrical configuration of channel derived from the single screw extruder. The deformation of the tracer is numerically integrated by the fourth order Runge-Kutta scheme. The evolutions of tracers are captured when time is forward. The tracers of the from different initial positions with different orientations reveal that growth of interfaces fall on the whole onto the linear relations accompanied by periodic osillatory effect. The closer the tracer approaches the channel walls, the more obvious the osillatory effect is. The pulse amplitude become larger and larger with time when the orientation of initial interface is along the direction of the channel height. Both have the same periods as those of the tracers which have the same midpoints with direction along the channel width. It shows that unsteady effect occurs in the mixing process during the course of the steady extrusion.
机译：从速度和垂直度两方面发展了单螺杆挤出机三维流动的无量纲控制方程，提出了一种无需求解压力方程即可求解非牛顿流的新方法。仿真涉及不可压缩流体服从幂律特性，以及有限体积法在单螺杆挤出机通道几何构型中的应用。示踪剂的变形通过四阶Runge-Kutta方案进行了数值积分。当时间到来时，将捕获示踪剂的演变。来自不同初始位置和不同方向的示踪剂表明，界面的增长总体上落在线性关系上，并伴有周期性振荡效应。示踪剂越接近通道壁，振动效果越明显。当初始界面的方向沿着通道高度的方向时，脉冲幅度随着时间而变得越来越大。两者具有与示踪剂相同的周期，示踪剂的中点沿通道宽度方向相同。它表明在稳定挤压过程中，混合过程中会产生不稳定的影响。

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