Table 4 Numerical values of skin friction coefficient \(C_{fx} ( \operatorname{Re}_{x} ) ^{1/2}\) for different values of a, ϕ, and ε
a | ε | ϕ | SWCNT | MWCNT |
|---|---|---|---|---|
\(C_{fx} ( \operatorname{Re}_{x} ) ^{1/2}\) | \(C_{fx} ( \operatorname{Re}_{x} ) ^{1/2}\) | |||
0.2 | 0.3 | 0.01 | 1.118923 | 1.119043 |
0.1 | Â | Â | 1.333363 | 1.333487 |
0.01 | Â | Â | 2.716088 | 2.716263 |
0.01 | 0.2 | 0.1 | 4.969901 | 4.972249 |
0.4 | Â | 1.629730 | 1.630798 | |
0.6 |  | −1.598538 | −1.599574 | |
0.01 | 0.1 | 0.05 | 5.984571 | 5.986487 |
| Â | 0.1 | 6.673508 | 6.677828 | |
| Â | 0.2 | 8.487619 | 8.498633 |