Sains Malaysiana 34(1): 133-138 (2005)
Kesan Medan Magnet Menegak ke atas
Lengkung Sut Olakan Benard-Marangoni Mantap
dalam Lapisan Mengufuk Bendalir
(The Effect of a Vertical Magnetic Field on the Onset of Study Bernard-Marangoni
Convection in a Horizontal Layer of Electrically Conducting Fluid)
Ruwaidiah Idris
Jabatan Matematik
Fakulti Sains dan Teknologi
Kolej Universiti Sains Dan Teknologi Malaysia
Mengabang Telipot
21030 Kuala Terengganu
Terengganu D. I, Malaysia
Ishak Hashim
Pusat Pengajian Sains Matematik
Fakulti Sains dan Teknologi
Universiti Kebangsaan Malaysia
43600 UKM Bangi, Selangor D.E., Malaysia
ABSTRAK
Dalam makalah ini kesan medan magnet menegak seragam ke atas lengkung sut permulaan olakan mantap Benard-Marangoni dalam lapisan bendalir mengufuk berpengalir elektrik dikaji tertakluk kepada kecerunan suhu yang seragam dalam had asimptot gelombang pendek. Kami dapati medan magnet tidak memberi kesan kepada sebutan utama lengkung sut dalam had gelombang pendek.
ABSTRACT
In this work we use an analytical technique to analyse the effect of a vertical uniform magnetic field on the onset of steady Benard-Marangoni convection in a horizontal layer of electrically conducting fluid subject to a uniform vertical temperature gradient in the asymptotic limit short waves. We found that in the limit of short waves, the leading order expression for the marginal curve is not affected by the magnetic field.
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