Aug 2026· Engineering· Vol 4, pp. 35-40· 0 citations· 10 references
Abstract
Shell-and-tube heat exchangers (STHEs) are widely used but limited by the low thermal conductivity of conventional fluids. This study uses CFD simulations to compare the thermal performance of Fe3O4-water and Al2O3-water nanofluids in an STHE under laminar flow. Nanoparticle concentrations of 5–20% and Reynolds numbers of 200-1000 were tested. Model validation showed deviations within ±8%. Results reveal that both nanofluids enhance heat transfer, with Fe3O4 consistently outperforming Al2O3. At ϕ = 20% and Re = 1000, Fe3O4 achieved a maximum heat transfer coefficient of 306.95 W/m²·K, about 318% higher than water and 40% above Al2O3. Temperature contours confirmed thinner boundary layers and greater heat removal for Fe3O4, highlighting its superior thermal capability for compact heat exchanger applications.
Shell-and-tube heat exchangers are widely used in industrial processes, but improving the shell-side heat transfer without causing excessive pressure losses remains a major engineering challenge. Numerical simulations provide an efficient approach for evaluating thermohydraulic enhancement techniques while reducing exp...
Manuel Anthony Pacherres Uchalín, Edwin Santiago Rios Escalante, Luis Fernando Saldaña Bernuy et al.· ACS Omega· 0 citations
An experimental investigation was conducted to evaluate the thermal and thermodynamic performance of a shell-and-helical-coil heat exchanger (SHHE) using nanofluids. Al2O3, CuO, and Fe2O3 nanoparticles dispersed in a 0.5 wt.% CMC base fluid was employed as the shell-side working fluid. The shell-side nanofluid temper...
A. Vinod, B. Naik· Journal of Thermal Science a...· 0 citations
The thermo-hydraulic performance of Ni-Fe3O4/water hybrid nanofluid (HNF) in a shell and helical tube heat exchanger (SHTHE) was investigated numerically and experimentally. A Eulerian mixture model was employed to simulate the two-phase flow behavior of the HNF and analyze the impacts of nanoparticle volume fraction a...
R. Abdulrahman, Ahmed J. Hamad, Safaa H. Faisal· Fluids· 0 citations
The enhancement of heat transfer device performance through the use of wire coil inserts and hybrid nanofluids can significantly improve convective heat transfer, though it also results in higher pumping power requirements. Therefore, a comprehensive investigation considering both heat transfer improvement and the effe...
A. I. Ramadhan, W. H. Azmi, I. Zakaria et al.· Scientific Experiences in Me...· 0 citations
The thermo-hydraulic performance of plain tube (PT) and twisted-tape (TT) inserts having different swirl angles (30°, 45°, 60°, and 90°) using base fluid (DW) and hybrid MWCNTs–Fe
3
O
4
nanofluids was numerically solved in this study. The physical problem was solved at various fluid-flow velocities (Re = 5000–1...
O. A. Alawi, I. Masalha, Abdullah N. Olimat et al.· Scientific Reports· 0 citations
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