Investigation of the effect of high viscous nanofluid on heat transfer in swirling flow in pipes

Heat convection problem related researches aim to determine and to increase heat convection coefficient, and the heat convection coefficient increment studies are known as the heat transfer enhancement. Works on the known classical enhancement techniques has been initiated before decades and are still on the way. Heat transfer enhancement by means of nanoparticles addition is started relatively in near past and accepted as a new technique. Subject of this thesis is these two techniques under the consideration. Fluid swirling and Al2O3 particle addition to the oil are the classical technique and nanofludization, respectively. Originality of the work is to use the advantage of a classical enhancement technique and to apply the nanoparticle addition. The work was performed in both numerically and experimentally, and the swirling flow and heat transfer problem were solved by ANSYS FLUENT software. Some geometrical quantities, hydrodynamic variables and the physical properties were taken as parameters under the context of the work. Findings of the work show that enhancement in heat transfers and increment in pressure loss depend on the fin angle of the swirl device and the mass fraction of the particles. The best performance was obtained for the case of 4 fins with the length l* = 0,75r0 and swirl angle of 90o at Re = 800, Pr = 400 for the numerical prediction and at Pe = 105 for the experimental investigation.