Showing 22 results for Type of Study: Research
Morteza Deilami, Pedram Pournaderi,
Volume 4, Issue 1 (9-2023)
Abstract
Heat transfer has an effective role in industrial and engineering applications. In this study, the effect of Al2O3 nanoparticles on laminar forced convection heat transfer flow in a tube is studied. Governing Equations are discretized using the finite difference method on a staggered grid. Nanofluid flow is simulated using single-phase and mixture models. Simulation results show that the average Nusselt Number increases with an increase in the Reynolds Number. Also, by increasing the volume fraction, the average Nusselt number and consequently the heat transfer rate increases. The results of the mixture model are in better agreement with experimental results than the single-phase model.
Dr Mohammad Sajjadnejad,
Volume 4, Issue 2 (11-2023)
Abstract
Nowadays, lithium-ion batteries have been commercialized and extensive research is done on improving their properties. The things that are currently the major part of the research are reducing the price of the battery, increasing the energy density of the battery, increasing the lifespan and improving the safety of the battery. In military applications and aviation industries, special attention is paid to battery reliability and safety. The gradual degradation of the materials used in lithium-ion batteries over a long period of time has a negative effect on the electrical performance, lifespan and safety of the battery. This is through increasing the electrical resistance of the battery and even cutting the internal connection of the battery, producing corrosion products and creating passive films on the surface of the material, creating pollutants inside the battery that may react with active materials and leading to loss of uniformity in the material enters the battery and the electrolyte is destroyed. Most of the materials used in lithium-ion batteries were modified after identifying these problems in the battery structure. This article mainly deals with the phenomenon of corrosion in positive and negative current collectors in lithium-ion batteries.
