纸浆纤维悬浮液物性参数对流动特性的影响

分析了纸浆的物性参数对两相流动模拟的影响，这些物性参数主要包括浆流种类、纤维的尺寸等参数，通过Phoen—ics软件的模拟得出结论，对于同类型的纸浆而言，随着浓度的增大，流体的速度梯度增大，剪切应力增大，径向浓度差增大；对于不同类型的纸浆，木浆的剪切应力大于同样浓度草浆的剪切应力；管道中浓度分布呈中心高，壁面低的单调递减趋势，很不均匀；对于不同类型的纸浆，草浆的径向浓度差小于木浆的径向浓度差．

TURBULENCE STUDY OF THE INFLUENCE OF MATERIAL PARAMETERS UPON THE PULP FIBRE SUSPENSIONS

In this paper, the material parameters of fibre suspensions (kind and dimension of the fibre) show an important influence upon turbulence. According to a simulation by the Phoenics software, we can draw the following conclusions: the velocity gradients increase with the concentration for the same kind of pulp suspension, and at the same time, the shear stress and the difference of the radial concentrations increase; for the different kind of pulp suspension, the shear stress of the wood pulp sus- pension is higher than that of the straw pulp suspension in the same concentration; the concentration of the pulp suspension is higher in the center, and lower at the wall surface, decreasing monotonously; the difference of the radial concentrations of the straw pulp suspension is smaller than that of the wood pulp suspension.