Indian Journal of Science and Technology, Vol 9(31), DOI: 10.17485/ijst/2016/v9i31/97817, August 2016 ISSN (Print) : 0974-6846 ISSN (Online) : 0974-5645 * Author for correspondence 1. Introduction e natural convection which characterize the twin competing buoyancy forces due to concentrations and temperature gradients or formally known as double- diffusive natural convection has been proved to be one of the important subject. Many studies have been conducted experimentally and numerically in the field of oceanography, biology, geology and the process of semiconductor growth 1-4 . e research done by Nishimura et al. 5 is one of the benchmark in most double-diffusive problems where they have concluded that the for a limited range of buoyancy ratio, an oscillatory flow will occurs. Later, many studies have been done for the problems of double-diffusive convection in an enclosure 6-10 . e problem of Marangoni convection arise when the side of the cavity being open to ambient air which triggers the Marangoni or the surface tension effect. Bergman 11 conducted a study in double-diffusive Marangoni convection and realize that the interaction between thermocapillary and diffusocapillary can be established in a flow. Jue 12 found that the fluid flow in a cavity will be altered by Marangoni effect. Teamah and El-Maghlany 13 studied on cavity with moving lid and reported that only the mass transfer increased by taking higher Lewis number. Saleh et al. 14 explained that by increasing the cooling factor, the heat transfer rate at the hot wall is increasing while it decreasing at the cold wall. Arbin et al. 15 investigated involving partial heating at vertical wall of an open cavity. ey found that the length of heater segment is a dominant factor in changing the rates of heat and mass transfer. e Marangoni flow is an important area to study and widely occurs in many fields such as extraction process, thermosolutal melting 16 and welding. In all heat and mass transfer activities, the presence of entropy generation which associated by thermodynamic Abstract Double-diffusive Marangoni convection in an open top square cavity filled with aqueous solution, which both verticals walls are differentially-heated and -salted, is studied numerically with the presence of entropy generation. The finite difference method is applied in this study where the governing parameters involved are the thermal (MaT) and solutal (MaC) Marangoni numbers, together with the Grashof (Gr), Biot (Bi), Prandtl (Pr), Lewis (Le) numbers. The aspect ratio of the cavity is 1 where the buoyancy ratio is kept at 2. The results are portrayed as the contours of streamlines, isotherms, isoconcentrations and entropy generation where the effect of Marangoni number is been considered. The predicted results shown that the heat and mass transfer have similar patterns unlike the entropy generation which display an increasing pattern as the Marangoni number increased. Keywords: Double-Diffusive, Entropy,Marangoni Effect Simulation on Double-Diffusive Marangoni Convection with the Presence of Entropy Generation Norazam Arbin 1 , Nur Suhailayani Suhaimi 2 and Ishak Hashim 3 1 Faculty of Computer and Mathematical Sciences, Universiti Teknologi MARA (Johor), 85000 Segamat, Johor, Malaysia; noraz574@johor.uitm.edu.my 2 Faculty of Computer and Mathematical Sciences, Universiti Teknologi MARA (Melaka), 77200 Jasin, Melaka, Malaysia; nursuh02@jasin.uitm.edu.my 3 School of Mathematical Sciences, Universiti Kebangsaan, Malaysia, 43600 Bangi, Selangor, Malaysia; ishak_h@ukm.edu.my