Table 2
Summary of the preliminary tests conducted on two batches of the graphite dispersions.
| Batch | A | B |
|---|---|---|
| Graphite supplier | Sky Spring Inc. | Sigma Aldrich |
| Concentration | 5 g/L + 0.1 g/L NaC | 10 g/L + 0.2 g/L NaC |
| Average size of the particles | 1 μm | 20 μm |
| Height “H” of the channel | 383 μm | 371 μm |
| Height “h” of the gap | 110 μm | 132 μm |
| Pin − Pout | 10 bar | 5 bar |
| Flow rate | 13 L/h | 10.2 L/h |
| Maximum average velocity “u0” | 32.8 m/s | 21.5 m/s |
| Cavitation number “σ” | 0.18 | 0.43 |
| Number of passes | 25 | 380 and 800 |
| Effective cavitating time lived by the particles | 1 ms | 20 ms and 42 ms |
| Centrifugation before TEM observation of the supernatant | 4000 rpm – 45 min | 1500 rpm – 45 min |