Abstract The mode of application of oscillation, axial or azimuthal, did not influence filtration performance, when filtering a calcite mineral with a d32 value of 2.7 µm. The equilibrium flux and deposit thickness correlated with shear stress, regardless of: filter type (metal slotted surface filter or homogeneous sintered filter); and mode of oscillation. Shear stress values up to 240 Pa were used and the particle compact believed to be at, or near, the deposited solids showed non-Newtonian flow behaviour described by the Herschel-Bulkley equation. The shear was computed using Comsol® to model the shear at, and near, the oscillating surface. The peak shear (maximum value) was used in the correlation for flux, which appeared to fit the data well and provide a realistic prediction for sustainable flux using a force balance model. The existence of a yield stress in the compact appeared to limit the internal fouling of the matrix (homogeneous) type of filter, which had a membrane thickness of 8 mm, but did not demonstrate significant internal fouling over time, nor between filtrations. Thus, the results were similar to those obtained for the surface filters, and the resistance to filtration was dominated by the deposit formed.

中文翻译：

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使用表面和矩阵类型微过滤器的方位和轴向振荡微过滤的比较，该微过滤器具有表现出非牛顿行为的滤饼-浆液剪切面

摘要 在过滤 d32 值为 2.7 µm 的方解石矿物时，轴向或方位角的振荡应用模式不会影响过滤性能。平衡通量和沉积厚度与剪切应力相关，无论：过滤器类型（金属开槽表面过滤器或均质烧结过滤器）；和振荡模式。使用高达 240 Pa 的剪切应力值，并且据信处于或接近沉积固体的颗粒压块显示出由 Herschel-Bulkley 方程描述的非牛顿流动行为。使用 Comsol® 计算剪切以模拟振荡表面处和附近的剪切。峰值剪切（最大值）用于通量的相关性，它似乎很好地拟合了数据，并使用力平衡模型为可持续通量提供了现实的预测。压块中屈服应力的存在似乎限制了膜厚为 8 毫米的基质（均质）类型过滤器的内部污垢，但随着时间的推移和过滤之间也没有表现出明显的内部污垢。因此，结果与表面过滤器获得的结果相似，过滤阻力主要由形成的沉积物决定。