EXPERIMENTAL AND SIMULATION STUDY OF SOLID FLOWS IN BEADS MILL
Nanoparticles nd its application in various elds. Apart from that, nanopar- ticles tend to agglomerate which will alter its physical and chemical properties, making it incompatible for the preferred application. To overcome this, dis- persion of nanoparticle is desirable which could prevent the a...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/47928 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Nanoparticles nd its application in various elds. Apart from that, nanopar-
ticles tend to agglomerate which will alter its physical and chemical properties,
making it incompatible for the preferred application. To overcome this, dis-
persion of nanoparticle is desirable which could prevent the agglomeration and
provide a good dispersion stability by retaining its properties. One of the most
popular technique for the dispersion of nanoparticles is beads milling process.
Disperion state of the resulted nanoparticle is controlled by some parameters.
There is a need to optimize those parameters to obtain nanoparticle with better
dispersion state. Experimental works to investigate the detailed hydrodynam-
ics and ow pattern in the whole system of bead mill is complicated and high
cost. Numerical modeling oers a method to predict the detailed hydrodynam-
ics and ow pattern in the entire system inexpensively. Numerical modelling
via DEM simulation was carried out to simulate the solid ows in beads mill.
In this study, the eect of rotation speed on the nanoparticle dispersion state
was discussed. Experimental results showed that rotational speed of 1,800 rpm
could introduce better dispersion state on the nanoparticle compared than that
of 1,200 rpm. Simulation results explained the solid velocity distribution prole
and its characteristics during the dispersion process. Experimental and sim-
ulation results were correlated to investigate the relation between particle size
distribution and solid particle velocity distribution prole. |
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