Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Erciyes Üniversitesi, Mühendislik Fakültesi, Makina Mühendisliği, Türkiye
Tezin Onay Tarihi: 2017
Tezin Dili: Türkçe
Öğrenci: Muqdad Khamees Hameed AL-JANABI
Danışman: Veysel Özceyhan
Özet:
In this work, a numerical study has been presented to investigate heat transfer
characteristics of (Al2O3-Water) nanofluids flow in a circular horizontal tube that fitted
pentagon rings by three different pitch lengths (d, 2d, and 3d). To provide fully
developed flow inside the test section, specified distances are performed on the entrance
and the exit of the tube. The analyses are carried out with three different nanofluids
volume fractions 1.5, 3, and 4.5 % in the range of Reynolds number from 5,000 to
15,000. The numerical solution procedure includes the investigation of heat transfer
coefficient, Nusselt number, friction factor, surface temperature and the pressure drop
characteristics with using finite volume method by applying (k-w) Standard turbulence
model to solve the equations of continuity, momentum, and energy in a threedimensional domain. A single-phase approach is employed to model nanofluids and
properties of the fluid are applied constant with temperature. The use of (Al2O3-Water)
nanofluids with pentagon ring leads to increase in heat transfer and pressure drop over
the smooth tube. The heat transfer coefficient increases with the increment of the
nanofluid concentrations and Reynolds number, and it shows descending trend with the
increment of pitch length or in another meaning increases with the increment of the
number of pentagon rings into a tube. Finally, the results showed that the configuration
of Al2O3-Water nanofluid with pentagon ring could be used effectively in heat transfer
processes