| Yazarlar |
Emrehan Gürsoy
|
Doç. Dr. Mehmet GÜRDAL
Kastamonu Üniversitesi, Türkiye |
|
Engin Gedik
Karabük Üniversitesi, Türkiye |
|
Kamil Arslan
Karabük Üniversitesi, Türkiye |
| Özet |
| Energy, entropy, and exergy analyses have been examined in sudden expansion tube (SET), which used in many thermal applications such as heat exchangers, micro-scale industry application, with both smooth (ST) and convex fin (CFT) surfaces. For the purpose of enhancing the thermal and hydraulic efficiency a ternary approach in which SET, and nanofluid, and convex fin have been employed together. Numerical parametric analyses have been carried out under steady-state, fully developed flow, and constant heat flux conditions with laminar, transitional and turbulent flow regimes (500≤Re≤10000) using Finite Volume Method (FVM). Two different working fluids as water and ferrofluid (Fe3O4/water) with φ=2.0% volume fraction have used. According to numerical results, the highest increment in the average Nusselt number (Nu) was caused by ferrofluid oc-curred in the laminar flow regime, approximately 7.0%, and its effect on the Darcy friction factor (f) was approximately 4.0%. On the other hand, the average Nu increased nearly twofold under the effect of convex fins at the transitional flow regime. Convex fins severely affected the f, causing an in-crement of nearly 260% in the turbulent flow regime. In the irreversibility analysis, convex fins performed the lowest dimensionless total entropy generation reducing up to 46.0% and increased the second-law efficiency up to 14.0% at Re=2000. Furthermore, the results of first-law efficiency, exergy outlet, exergy loss, and pumping power were investigated in detail and entropy generation results were supported with contours. |
| Anahtar Kelimeler |
| Convex fins | Energy analysis | Entropy analysis | Exergy analysis | Performance evaluation criterion | Quadruple flow regime | Sudden expansion tube |
| Bildiri Türü | Tebliğ/Bildiri |
| Bildiri Alt Türü | Tam Metin Olarak Yayımlanan Tebliğ (Uluslararası Kongre/Sempozyum) |
| Bildiri Niteliği | Alanında Hakemli Uluslararası Kongre/Sempozyum |
| Bildiri Dili | İngilizce |
| Kongre Adı | 9th International Symposium on Advances in Computational Heat Transfer |
| Kongre Tarihi | 26-05-2024 / 30-05-2024 |
| Basıldığı Ülke | Türkiye |
| Basıldığı Şehir | İstanbul |
