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国际流体力学研究期刊
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN 打印: 2152-5102
ISSN 在线: 2152-5110

国际流体力学研究期刊

DOI: 10.1615/InterJFluidMechRes.v38.i4.20
pages 312-327

Marangoni Convection inWater-Isopropanol Mixtures in the Presence of Soret Effect

Mohammad Azizur Rahman
Mushroom Research Centre, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Department of Biochemistry and Molecular Biology, Jahangirnagar University, Savar, Dhaka, Bangladesh
M. Ziad Saghir
Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria St., Toronto, ON M5B2K3, Canada

ABSTRACT

In the present study, the onset of Marangoni convection in a liquid layer overlaying a porous layer where the whole system is being laterally heated is investigated. The non-linear two-dimensional Navier Stokes equations, the energy equation, the mass balance equation and the continuity equation are solved for the liquid layer. The Brinkman model is used for the porous layer. The partial differential equations are solved numerically by using the finite element technique. Two different cases are analyzed in this paper. In the first case, the Marangoni convection in the absence of the Soret effect is studied. Results revealed when the liquid layer and the porous layer have identical thickness, the convective flow remains in the liquid layer and this is independent of changing the aspect ratios (length-to-height). However, the flow covers the entire cavity when the liquid layer thickness is very small (less than 1/10 of the porous layer). In the case of Marangoni convection in the presence of Soret effect, it has been found that the convective flow remains in the liquid layer even when the liquid layer thickness is very small.


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