Numerical Investigations on Heat Transfer Characteristics of Single Particle and Hybrid Nanofluids in Uniformly Heated Tube

In the present study, heat transfer characteristics, namely, coefficient, Nusselt number, pressure drop, friction factor and performance evaluation criteria are evaluated for water, Al2O3 Al2O3/Cu nanofluids. The effects of Reynolds volume fraction composition nanoparticles in hybrid nanofluid analyzed all characteristics. single particle nanofluids flowing through a plain straight tube which is symmetrically heated under uniform flux condition. numerical model validated number within 7.66% error 8.83% with corresponding experimental results from previous literature study. thermophysical properties superior to water. drop show increasing trend increase fraction. shows parabolic trend, small variations change number. However, both have increased 2.0% equal (50/50%) presented characteristics among working fluids. Further, enhanced by changing nanoparticle compositions. Al2O3, (50/50%), (75/25%) (25/75%) as 1.08, 1.11, 1.10 1.12, respectively.