Effect of hybrid nanofluids on thermal and hydraulic characteristics of hexagon tube

Kadhim Fadhil Nasir, Haider R D Al-Hamadani and Hassan Ali Jurmut

Abstract

The commonly determinations of present study are evaluation numerically the thermal transfer and hydraulic distribution inside the turbulent flow pattern for Al₂O₃-water nanofluids and hybrids fluid of (Al₂O₃ and CuO) dispersed in pure water concluded a straight hexagon pipe with constant thermal heat flux thermal conditions. 20 nm average diameters of nano particles and 0.1% volume fraction is employed. The numerical analysis includes the numerical simulation of straight tube model by a package ANSYS FLUENT 18 for constant heat flux value of 1 × 10⁴ W/m² and the Reynolds number had a range of 6 × 10³ to 4 × 10⁴. The consequences displayed that heat transfer coefficient of hybrid fluid was better than that of Al₂O₃-water and pure water by 12% and 23.4% respectively at all Reynolds numbers. The friction factor of hybrid fluid is superior to that of nanofluid and pure water by 4.6% and 11.7% respectively. It found improvement in thermal performance of hybrid fluid compared to that of nanofluids and the pure water. The numerical consequences of Nusselt number values and friction factor magnitudes are validated with the literature consequences obtained and display significant agreement, with a deviation of 7.8 % and 6.4% respectively.