Review On Enhancement Of Natural Convection Heat Transfer Inside Enclosure

Heat transfer by natural convection from a hot source to its cold surrounding or then to cold enclosure were used in wide engineering applications such as solar energy, thermal storage plants, cooling of reactors, microelectronic systems, and gas insulated electrical transmission systems. The aim of existing of the enclosure is to reduce the heat transfer from the inner hot wall or to protect the inner body in harsh outdoor environment. Many authors carried out studies about this topic and used different methods to enhance the heat transfer such as using of nanofluids or porous media to increase the thermal conductivity of the base fluid. Other methods included applying the vibration and magnetic field on the system, or by changing the geometry of the enclosure, Rayleigh number, thermal boundary conditions, etc. The present paper includes a review on the natural convection heat transfer enhancement techniques inside enclosure with different geometries.