| Heat transfer correlation author | Radius ratio | Cylindrical gap ratio | Axial ratio | Axial Reynolds number | Taylor number | Nu/h (W/m2・K) |
| Tachibana & Kukui | 0.937 | 0.1700 | 11.3 | 4.2E3 | 3.4E3 | 76/317 |
| Hanagida & Kawasaki | 0.990 | 0.0094 | 283.0 | 1.0E4 | 2.0E5 | 62/256 |
| Nijaguan & Mathiprakasam | 0.750 | 0.1650 | 195.0 | 2.0E3 | 3.6E5 | 370/256 |
| Boufia et al. | 0.956 | 0.0450 | 98.4 | 3.1E4 | 4.0E5 | 193/805 |
| Korsterin et al. | 0.780 | 0.0271 | 77.5 | 3.0E5 | 8.0E5 | 149/623 |
| Grosgeorge | 0.980 | 0.0200 | 200.0 | 2.7E4 | 4.9 | 144/600 |
| Childs & Turner | 0.869 | 0.1500 | 13.3 | 1.4E6 | 1.2E11 | 463/1800 |
| Present study | 0.888 | 0.0017 | 31.7 | 7.6E3 | 3.3E8 | 318/1329 |