3D Buoyancy-Induced Flow and Entropy Generation of Nanofluid-Filled Open Cavities Having Adiabatic Diamond Shaped Obstacles

Lioua Kolsi 1,2, Omid Mahian 3,*, Hakan F. Öztop 4,5, Walid Aich 1,6, Mohamed Naceur Borjini 2, Nidal Abu-Hamdeh 5 and Habib Ben Aissia 2 1 College of Engineering, Mechanical Engineering Department, Haïl University, Haïl City 2240, Saudi Arabia; [email protected] or [email protected] (L.K.); [email protected] (W.A.) 2 Unité de Recherche de Métrologie et des Systèmes Energétique, Ecole Nationale d’Ingénieurs, University of Monastir, Monastir City 5000, Tunisia; [email protected] (M.N.B.); [email protected] (H.B.A.) 3 Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad 9187147578, Iran 4 Department of Mechanical Engineering, Technology Faculty, Fırat University, Elazig 23119, Turkey; [email protected] 5 Mechanical Engineering Department, Faculty of Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia; [email protected] 6 Unité de Recherche Matériaux, Énergie et Énergies Renouvelables, Faculté des Sciences de Gafsa, Gafsa 2100, Tunisia * Correspondence: [email protected]; Tel.: +98-513-843-6545