Numerical Study of Natural Convection Between Two Coaxial Inclined Cylinders

1 Department of Mechanical Engineering, Faculty of Technology, University of 20 Août 1955 – Skikda, Skikda, Algeria 2 Department of Physics, Faculty of Sciences, University 20 août 1955 – Skikda, B.P 26 Route El-Hadaiek, Skikda 21000, Algeria 3 Mechanical Engineering Department, College of Engineering, University of Babylon, Babylon City 51002, Hilla, Iraq 4 Mechanical Engineering Department, College of Engineering, Hail University, 2240, Hail City, Saudi Arabia 5 Laboratoire de Métrologie et des Systèmes Énergétiques, École Nationale d’Ingénieurs, University of Monastir, 5000, Monastir, Tunisia 6 Department of Mechanical Engineering, College of Engineering at Wadi Addwaser, Prince Sattam Bin Abdulaziz University, 18311, KSA 7 Department of Mechanical Engineering, Faculty of Engineering, University of Khartoum, 11115, Sudan