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Solar pond modeling with density and viscosity dependent on temperature and salinity
Authors:MC Giestas  Heitor L Pina  Jorge P Milhazes  Célia Tavares
Affiliation:1. School of Mechatronic Engineering, Xi''an Technological University, Xi''an 710021 China;2. Mechanical Engineering Department, University of Technology, Baghdad, Iraq;3. Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;4. Department of Mechanical Engineering, College of Engineering, King Khalid University, Abha 61421, Saudi Arabia;5. Department of Civil Engineering, College of Engineering, Prince Sattam bin Abdulaziz University, Alkharj 11942, Saudi Arabia;1. Energy & Environment Research Center, Niroo Research Institute (NRI), Shahrak Ghods, Tehran, Iran;2. Department of Mechanical Engineering, Faculty of Engineering, University of Mohaghegh Ardabili, P.O. Box 179, Ardabil, Iran;3. School of Mechanical Engineering, College of Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran;4. Faculty of Mechanical Engineering, Department of Energy System Engineering, K.N. Toosi University of Technology, Pardis Ave., Tehran, Iran
Abstract:The paper presents a 2D numerical model where the behavior of a salt gradient solar pond (SGSP) is described in terms of temperature, salt concentration and velocity with the fluid density and viscosity dependent on temperature and salt concentration. The discretization of the governing equations is based on the respective weak formulations. The rectangular geometry allows for spectral type Galerkin approximations for which the essential homogeneous boundary conditions can easily be imposed. Taking into account the variation of density and viscosity with temperature and salinity improved the agreement between the numerical and the experimental results.
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