Abstract
Nanoparticles (NPs) are widely used in various applications. NPs agglomeration will alter its physical and chemical properties. To overcome this, dispersion of NPs by beads mill is desirable to achieve good dispersion stability. Experimental works to investigate the dynamics of the system is complicated and high cost. On the other side, numerical models offer alternative method inexpensively. In this research, the effect of impeller rotation speed on the NPs by experimental and simulation study dispersion state was discussed. Experimental results showed that rotational speed of 2400 rpm could introduce a better reduction size and dispersion state than that of 1200 and 1800 rpm. Numerical modelling via Discrete Element Method (DEM) simulation was carried out to study the solid velocity distribution profile during the dispersion process. Experimental and simulation results were correlated to investigate the relation between the particle size distribution and the particle velocity distribution profile.
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