Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/6840
Title: Enhancement of heat transfer in partially heated vertical channel under mixed convection by using Al2O3 nanoparticles
Authors: Çelik, Hasan
Mobedi, Moghtada
Manca, Oronzio
Buonomo, Bernardo
Çelik, Hasan
Izmir Institute of Technology. Mechanical Engineering
Keywords: Heat transfer
Mixed convection
Nanoparticles
Aluminum oxides
Issue Date: Feb-2018
Publisher: Taylor and Francis Ltd.
Source: Çelik, H., Mobedi, M., Manca, O., and Buonomo, B. (2018). Enhancement of heat transfer in partially heated vertical channel under mixed convection by using Al2O3 nanoparticles. Heat Transfer Engineering, 39(3), 229-240. doi:10.1080/01457632.2017.1295738
Abstract: Laminar mixed convection in a two-dimensional symmetrically and partially heated vertical channel is investigated. The heaters are located on both walls and uniform temperature is applied on the heated sections. The number of heaters is considered as 1, 4, 8, and 10. Aluminum oxide/water nanofluid is considered as working fluid and the inlet velocity is uniform. The continuity, momentum and energy equations with appropriate boundary conditions are solved in dimensionless form, numerically. The study is performed for Richardson number of 0.01 and 10, Reynolds number of 100 and 500, and nanofluid volume fraction of 0% and 5%. Based on the obtained velocity and temperature distributions, the local and mean Nusselt number is calculated and plotted for different cases. The variation of the mean Nusselt number with the number of the heated portions is also discussed. It is found that the addition of nanoparticles into the base fluid increases mean Nusselt number but the rate of increase depends on Reynolds, Richardson numbers and number of heated portions. It is possible to increase mean Nusselt number 138% by increasing Reynolds number from 100 to 500, Richardson number from 0.01 to 10 and number of heated portions from 1 to 10 when volume fraction value is 5%.
URI: https://doi.org/10.1080/01457632.2017.1295738
http://hdl.handle.net/11147/6840
ISSN: 0145-7632
0145-7632
Appears in Collections:Mechanical Engineering / Makina Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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