Subject Area
Mechanical Power Engineering
Article Type
Original Study
Abstract
The present work theoretically investigates the problem of laminar forced convection flow of nano-fluids through uniformly heated annuli. The annuli were heated under constant heat flux acting on the inside and outside surfaces at a time . Numerical results are obtained using fluent 6.3.26 code, for aluminum oxide (Al2o3) and copper oxide (CuO) nano-particles mixed with pure water with different volume fraction varied between 1% and 4%. The results were compared with that of pure water for code validation and show a good agreement . The results showed that the inclusion of nano-particles in the base fluid produces an augmentation of the heat transfer coefficient that clearly increase with the nano-particles concentration. The heat transfer also increases with Reynolds number. The results showed also that the heat transfer using CuO as nano-particles was higher than that using (Al2o3) nano-particles at the same concentration. The heat transfer also increases with Reynolds mumber. A oerformance evaluation showed that the highest efficiency index (performance) occurred with (Al2o3) nano-particles of 1% volumetric concentration.
Recommended Citation
Sultn, M. A.; Rabee, L. H.; and Hegazi, A. A.
(2013)
"Forced Convection Heat Tranfer of Nano-Fluids through Stationary Annulus,"
Mansoura Engineering Journal: Vol. 38
:
Iss.
2
, Article 5.
Available at:
https://doi.org/10.58491/2735-4202.3158
