Cooling a partially elastic and elliptical surface under the influence of a magnetic field using a Cu-water nanofluidic impingement jet

In this thesis, the heat transfer and flow structure of the partially elastic and curved surface under the influence of magnetic field with Cu-water nanofluid impingement jets were numerically investigated. Impingement jets, which are one of the various methods of increasing heat transfer, are becoming more and more important today in order to perform processes such as heating, cooling or drying by increasing heat and mass transfer. Nanofluids containing metal or metal oxide nanoparticles with higher thermal and electrical conductivity than base fluids to enhance heat transfer in impingement jets have been the subject of many studies. In this study, the effects of external magnetic field effect at 0, 2, 5, 10 and 20 values of Hartmann number (Ha), which is an indicator of magnetic field strength, on flow and heat transfer on Cu-water nanofluid containing nanoparticles at 0, 0.03 and 0.05 volume fraction (φ) it has been examined. In the thesis, the effect of the curvature (1/4, 1/2 and 3/4 of a/b=2/3, which is the ratio of the half-axes of the curved surface), which is frequently used in real life and engineering applications, was examined. Considering that the materials have different modulus of elasticity, analysis were carried out at values with elasticity modules of 104, 105, 106, 108, 109 in the study. The calculations in the study were made using the finite element method in COMSOL package program. The results of the analysis are shown with streamlines and isoterm curves, and heat transfer values are also expressed with Nusselt numbers. The results showed that when the nanoparticle volume fraction goes up it significantly improves the heat transfer. The curvature effect has been compared for four different models. It has been determined that full curvature among models gives more efficient results than other models. This effect becomes more pronounced for high Reynolds numbers. It has been observed that the magnetic field increases heat transfer on curved surfaces and other surfaces. This increase tends to damp the flow for higher values of the Hartmann number. With the increase in the modulus of elasticity, an increase in the Nusselt number was determined.