Table 6 Nusselt number enhancement ratios. Nusselt number enhancement ratios for every nanoparticle radius reducing by half
A | φ | Ra = 103 | Ra = 103 | Ra = 105 | Ra = 105 |
---|---|---|---|---|---|
\( \frac{N{u}_{r=20}- N{u}_{r=40}}{N{u}_{r=40}} \) | \( \frac{N{u}_{r=40}- N{u}_{r=80}}{N{u}_{r=80}} \) | \( \frac{N{u}_{r=20}- N{u}_{r=40}}{N{u}_{r=40}} \) | \( \frac{N{u}_{r=40}- N{u}_{r=80}}{N{u}_{r=80}} \) | ||
2:1 | 1% | 0.3% | 0.3% | 0.54% | 0.14% |
3% | 0.28% | 0.3% | 0.65% | 0.35% | |
5% | 0.29% | 0.3% | 0.45% | 0.48% | |
4:1 | 1% | 0.29% | 0.29% | 0.47% | 0.10% |
3% | 0.28% | 0.29% | 0.73% | 0.40% | |
5% | 0.28% | 0.29% | 1.0% | 0.56% |