Sains Malaysiana 40(4)(2011): 391–395

MHD Boundary Layer Flow Due to an Exponentially Stretching Sheet with Radiation Effect

(Aliran Lapisan Sempadan MHD Berpunca daripada Regangan HelaianSecara Eksponen dengan Kesan Sinaran)

Anuar Ishak*

School of Mathematical Sciences, Faculty of Science and Technology

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor D.E., Malaysia

Received: 9 December 2009 / Accepted: 21 June 2010

ABSTRACT

The effect of radiation on magnetohydrodynamic (MHD) boundary layer flow of a viscous fluid over an exponentially stretching sheet was studied. The governing system of partial differential equations was transformed into ordinary differential equations before being solved numerically by an implicit finite-difference method. The effects of the governing parameters on the flow field and heat transfer characteristics were obtained and discussed. It was found that the local heat transfer rate at the surface decreases with increasing values of the magnetic and radiation parameters.

Keywords: Boundary-layer; heat transfer; MHD; radiation; stretching sheet

ABSTRAK

Kesan sinaran terhadap aliran lapisan sempadan magnetohidrodinamik (MHD) bagi bendalir likat di atas helaian meregang secara eksponen dikaji. Sistem persamaan menakluk dalam bentuk persamaan pembezaan separa dijelmakan kepada persamaan pembezaan biasa sebelum diselesaikan secara berangka menggunakan kaedah beza-terhingga tersirat. Kesan parameter-parameter menakluk terhadap ciri-ciri aliran dan pemindahan haba diperoleh dan dibincangkan. Didapati bahawa kadar pemindahan haba setempat pada permukaan berkurang dengan pertambahan nilai parameter magnet dan parameter sinaran.

Kata kunci: Lapisan sempadan; MHD; pemindahan haba; regangan helaian; sinaran

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*Corresponding author, email: anuar_mi@ukm.my