Numerical Analysis of the Influence of Buoyancy Ratio and Dufour Parameter on Thermosolutal Convection in a Square Salt Gradient Solar Pond Yassmine Rghif 1,* , Belkacem Zeghmati 2 and Fatima Bahraoui 1 1 Team of Heat Transfer and Energetic (UAE/U10FST), Faculty of Sciences and Techniques of Tangier, Abdelmalek Essaâdi University, Tangier, 90040, Morocco 2 Mathematics and Physics Laboratory (LAMPS), Perpignan Via Domicia University, Perpignan, 66860, France * Corresponding Author: Yassmine Rghif. Email: rghifyassmine@gmail.com Received: 18 January 2022 Accepted: 20 February 2022 ABSTRACT Revise the abstract as follows: This work aims to investigate numerically the influence of the buoyancy ratio and the Dufour parameter on thermosolutal convection in a square Salt Gradient Solar Pond (SGSP). The absorption of solar radiation by the saline water, the heat losses and the wind effects via the SGSP free surface are considered. The mathematical model is based on the Navier-Stokes equations used in synergy with the thermal energy equation. These equations are solved using the finite volume method and the Gauss algorithm. Velocity-pressure coupling is implemented through the SIMPLE algorithm. Simulations of the SGSP are performed for three values of buoyancy ratio (N = 1, 2 and 10), three values of Dufour parameter (Df ¼ 0, 0.2 and 0.8) and some sample meteorological data (Tangier, Morocco). Results show that the highest dimensionless temperature of the storage zone is found for N = 10. In the same zone and for the same value of N, the dimensionless salt concentration decreases very slightly versus time (unlike for N = 1 or 2). Moreover, increasing Df from 0 to 0.8 causes a decrease in the dimensionless tempera- ture of the SGSP storage zone and this decrease is more pronounced for N = 1 and N = 2. KEYWORDS Buoyancy ratio; Dufour effect; numerical investigation; salt gradient solar pond; thermosolutal convection Nomenclature C* Dimensionless salt concentration ¼ C  C min ð Þ= C max  C min ð Þ D f Dufour parameter ¼ j TC C max  C min ð Þ ð Þ= a T max  T min ð Þ ð Þ g Gravitational acceleration, m/s 2 H Pond height, m I 0 Incident solar radiation, W/m 2 I r Reflected solar radiation, W/m 2 L Pond width, m Le Lewis number ¼ a=D N Buoyancy ratio ¼ b C C max  C min ð Þ ð Þ= b T T max  T min ð Þ ð Þ P* Dimensionless pressure ¼ H 2 P ð Þ  qa 2 Pr Prandtl number ¼ m=a T* Dimensionless temperature ¼ T  T i ð Þ= T max  T min ð Þ This work is licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. DOI: 10.32604/fdmp.2022.021500 ARTICLE ech T Press Science