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We plotted the actual amount of mixing as a result of shear and the maximum allowable shear in the figure below, as calculated by the MathCad MathCAD file versus flow rate. This calculation included losses in both the 180-degree bends as well as the vertical sections. This graph shows an increase in the degree of mixing and shear with increasing flow rate. The large G-theta calculated by the MathCAD file shown on the graph also shows that G-theta of the Demo Plant depends on both the loss in the 180-degree bend sections as well as in the vertical columns. This is due to the fact that the Demo Plant lamellas are very thin, compared to those in the actual plant, so that frictional interactions with the baffle walls are significant and cannot be neglected.
The following graph shows how the loss coefficient (including both major and minor losses) varies with the flow rate. This is also based on calculations shown in the MathCAD file. In this graph, we see a decrease in total losses with increased flow rate.
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