The spin rate was therefore much more uniform and lower than that in the active layer as shown in Fig. 8. The active layer was at the left-side of the can, as shown in Fig. 5A and B. The collision and fast motion of solids resulted in www.selleckchem.com/products/gsk1120212-jtp-74057.html the violent spin in the active regimes as shown in Fig. 8A and B. With increase in the solid fraction, the active regime was shrinking, and close to the headspace. The spin rate became much uniform within most of the can, except the region close to the headspace (Fig. 8C). The range of internal spin rate significantly decreased (Fig. 11A). It lay somewhere between (i) 3 and 30 rpm for
the solids fraction of 10% (w/w), (ii) 1.8 and 24 rpm for the solids fraction of 20% (w/w), and (iii) 1.8 and 14.4 rpm for the solids fraction of 40% (w/w), and the average was 9.08, 9.94 and 7.36 rpm, respectively. The uniformity of the spin increased with the solids fraction (Table 1). When the water was replaced by the golden syrup, the solids was suspended or stayed by the can wall due to the high liquid viscosity (27 Pa s) and liquid density (1422.5 kg/m3).
The solids moved more or less as a rigid Anti-diabetic Compound Library solubility dmso body. The solids spin was slightly high in the region close to the can wall while it was slightly low at the central region of the can, as shown in Fig. 9. With increase in the solid fraction, a large stagnant core zone can be seen in the central region of the can (Fig. 6C), where the solid concentration was too high and limited the solids motion. The maximum internal spin rate almost kept a constant (Fig. 11B), the internal spin
rate was between (i) 3 and 16.8 rpm for the solid fraction of 10% (w/w), (ii) 0.6 and 16.8 rpm for the solids fraction of 20% (w/w), and (iii) 1.2 and 17.4 rpm for the solids fraction of 40% (w/w), and the average was 8.12, 7.54 and 8.54 rpm, respectively. The solids spin was quite low. This further demonstrates that the rotation is determined by the flow pattern of the bulk solids, Urease the solids concentration, the liquids viscosity, and the density difference between the solids and liquid. When the solids were in the diluted golden syrup, the internal spin rate was changed significantly with the solids fraction. It was much higher at the solid fraction of 20% (w/w) than that at the solids fractions of 10% (w/w) and 40% (w/w). The solids spin was also much less uniform than that in water and in golden syrup as shown in Fig. 10. As well expected, in the diluted golden syrup, the buoyancy was dominated the solids motions, by comparing the densities between potato (1080 kg/m3) and the dilute golden syrup (1318.6 kg/m3). Solids floated in the can and tended to stay close to the headspace, leaving much more space in the region close to the right-side of the can. The solids tended to move straight upwards with a higher speed, and no longer travelled as a rigid body following the can’s rotation (Fig. 7).
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