Mixed convection and entropy generation analysis of carbon nanotube-water nanofluid in a square cavity with cylinders and flow deflectors
Year: 2025
Type: article
Abstract: This study explores the mixed convection of carbon nanotube (CNT)-water nanofluid within a square cavity containing heated cylinders under the influence of a magnetic field , focusing on three geometric configurations : a single heated cylinder, two heated cylinders, and two heated cylinders with a flow deflector . The impact of various parameters, including Reynolds number ( Re ), Richardson number ( Ri ), Hartmann number ( Ha ), wavy wall peaks ( n ), nanoparticle volume fraction ( ϕ ), Hartmann angle ( γ ), rotational speed ( ω ), and inclination angle ( α ), on thermal and fluid dynamic behaviors is analyzed. MWCNT nanofluids exhibit up to a 19.1% increase in N u a v e compared to SWCNT nanofluids, confirming their superior heat transfer performance. Adding a second heated cylinder increases N u a v e by approximately 71.7% compared to a single-cylinder configuration, while the inclusion of a flow deflector modifies vortex structures, further enhancing convective transport. Increasing wavy wall peaks ( n ) enhances heat transfer by intensifying vortex formation and disrupting thermal boundary layers , leading to a more uniform temperature distribution . SWCNT nanofluids exhibit Bejan numbers up to 58.7% higher than MWCNT nanofluids, indicating greater thermal irreversibility . These findings provide valuable insights for optimizing thermal management systems in engineering applications , highlighting the importance of selecting appropriate nanofluids, geometric configurations, and magnetic field parameters to achieve optimal thermal performance and fluid stability.
Source: Results in Engineering
Institutions: University of Barishal, University of Florida
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,940
OpenAlex ID: W4409725513