Table 1.
Effect of the column radius on Nobs/N0
| dp (μm) | 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|---|
| N0 | 3770 | 15100 | 34000 | 60400 | 94300 | |
| Max Nobs | 735 | 13600 | 33400 | 60100 | 94200 | |
| ac = 150 μm | ar range (μm) | – | 12 | 9–25 | 8–38 | 7–52 |
| Max Nobs/N0 | 19.5% | 90.1% | 98.2% | 99.5% | 99.9% | |
| Max Nobs | 94 | 3600 | 25700 | 55600 | 91400 | |
| ac = 500μm | ar range (μm) | – | – | – | 26–35 | 22–52 |
| Max Nobs/N0) | 2.5% | 23.8% | 75.6% | 92.1% | 96.9% | |
| Max Nobs | 68 | 535 | 10000 | 41600 | 82000 | |
| ac = 1000μm | ar range (μm) | – | – | – | – | – |
| Max Nobs/N0 | 1.8% | 3.5% | 29.5% | 68.9% | 86.6% |
Pm = 4000 psi; D = 5.0 × 10−10 m2/s; η = 0.001 N s/m2; b = 0.64; φ = 750; g = 30; λ = 2.