Table 3 Previous studies employing RNG k–ε turbulence model.
S.no | Application/geometry | Working fluid | Key findings on RNG k–ε usage | Reference |
|---|---|---|---|---|
1 | Parabolic trough receiver with inserts (slits/arc-plugs) | Synthetic oil | RNG k–ε provided a reliable prediction of heat transfer enhancement with inserts | Pandey et al.13 |
2 | Effects of rib arrangements in parabolic trough receiver | Water | RNG k–ε effectively captured turbulence and heat transfer enhancement due to ribs | Liu et al.18 |
3 | Hydrothermal study with conical rings (solid and perforated) | Water | RNG k–ε successfully predicted Nu and f in tubes with perforated conical rings | Hassan et al.20 |
4 | Parabolic trough solar collector with hybrid nanofluid and inserts | Hybrid nanofluid | RNG k–ε is suitable for analyzing turbulent mixing and pressure drop with nanofluids | Samiezadeh et al.25 |
5 | Development/validation of RNG k–ε turbulence model | General flows | RNG k–ε is widely recommended for internal flows with curvature, ribs, and strong turbulence | Breussin et al.35 |
