TITLE
HEAT TRANSFER ANALYSIS OF FULLY DEVELOPED TURBULENT NON-NEWTONIAN NANO AND HYBRID NANOFLUID FLOW IN A HORIZONTAL PIPE UNDER CONSTANT HEAT FLUX
AUTHOR(S)
Damla Özgür
ABSTRACT
This study investigates the thermal and flow characteristics of fully developed turbulent non-Newtonian (powerlaw type) nano and hybrid nanofluids flowing through a horizontal pipe under constant heat flux. Carboxymethylcellulose (CMC) solution is used as the base fluid, while Al₂O₃, CuO and hybrid (Al₂O₃+CuO) nanoparticles are employed as additives. The governing equations are non-dimensionalized and solved under steady-state and axisymmetric assumptions. Nusselt number, friction factor, and thermal performance ratio (TPR) are analyzed. Results show that hybrid nanofluids provide approximately %15–20 higher heat transfer enhancement compared to mono nanofluids, while the increase in friction factor remains moderate. The optimum particle volume fraction is found to be around φ≈%2.5. This study demonstrates that hybrid nanofluids in non Newtonian matrices are efficient alternatives for improving convective heat transfer in turbulent flow systems. Keywords: Non-Newtonian fluid, hybrid nanofluid, turbulent flow, heat transfer, constant heat flux.
DOI
How to cite this article:
Damla Özgür, HEAT TRANSFER ANALYSIS OF FULLY DEVELOPED TURBULENT NON-NEWTONIAN NANO AND HYBRID NANOFLUID FLOW IN A HORIZONTAL PIPE UNDER CONSTANT HEAT FLUX, UNITECH – SELECTED PAPERS - 2025