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http://dx.doi.org/10.17576/jsm-2018-4707-31
Flow
and Heat Transfer in a Nanofluid Thin Film over an Unsteady Stretching Sheet
(Aliran
dan Pemindahan Haba dalam Filem Nipis Nanobendalir atas Kepingan Meregang Secara
tak Mantap)
R.C. AZIZ1, I. HASHIM2*
& S. ABBASBANDY3
1Faculty of Science & Technology Open
University Malaysia 50480 Kuala Lumpur, Federal Territory, Malaysia
2School of Mathematical Sciences, Faculty
of Science and Technology, Universiti Kebangsaan Malaysia, 43600
UKM Bangi, Selangor Darul Ehsan, Malaysia
3Department of Mathematics, Imam Khomeini
International University, Ghazvin 34149-16818, Iran
Received: 11
September 2017/Accepted: 27 February 2018
ABSTRACT
This study analyzes the heat
transfer of a thin film flow on an unsteady stretching sheet in nanofluids.
Three different types of nanoparticles are considered; copper Cu, alumina Al2O3 and titania TiO2 with
water as the base fluid. The governing equations are simplified using
similarity transformations. The resulting coupled nonlinear differential
equations are solved by the Homotopy Analysis Method (HAM).
The analytical series solutions are presented and the numerical results
obtained are tabulated. In particular, it shows that the heat transfer rate
decreases when nanoparticles volume fraction increases.
Keywords: Heat transfer; nanofluids;
thin film flow
ABSTRAK
Kajian ini
menganalisis pemindahan haba bagi aliran filem nipis di atas kepingan meregang secara
tak mantap dalam nanobendalir. Tiga jenis nanozarah berbeza telah
dipertimbangkan; tembaga Cu, alumina Al2O3 dan titania TiO2 dengan
air sebagai bendalir asas. Persamaan menakluk dipermudahkan
dengan menggunakan persamaan penukaran. Persamaan pembeza
tidak linear berangkai yang terhasil diselesaikan melalui Kaedah Analisis
Homotopi (KAH). Siri penyelesaian analitik
ditunjukkan dan keputusan berangka yang diperoleh dijadualkan. Secara
khususnya ditunjukkan bahawa kadar pemindahan haba
menurun apabila isi padu pecahan nanozarah meningkat.
Kata
kunci: Aliran filem nipis; nanobendalir; permindahan haba
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*Corresponding author; email: ishak_h@ukm.edu.my
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