Abstract
Numerous scientists have examined circular dimpled surfaces, tubes, and other approaches for enhancing heat transfer. Moreover, the dimples' angle of attack has a substantial effect on the tube's flow and thermal features. This numerical study presents a novel approach to enhancing heat transfer rate in a tube subjected to constant heat flux by incorporating a surface dimpling strategy and evaluates three different tube layouts with elliptical dimpled fins for different working fluids such as DW and Al<sub>2</sub>O<sub>3</sub>/DW nanofluid (&#966; &#61; 0.5-1.0&#37;) by using ANSYS Fluent v2020R2 under laminar flow conditions. Under identical circumstances, the thermal performances of proposed designs are compared to those of a smooth tube, and the influence of the elliptical dimpled fin angle of attack on these parameters is determined for different Reynolds numbers (1000 &#8804; Re &#8804; 2000). When comparing the Nusselt number of a tube with/without elliptical dimpled fins, it is found that EDT 1 performed better. Lower Reynolds numbers are shown to result in a greater friction factor. Besides, elliptical dimpled fins promote flow mixing within the tube and the establishment of a thermal boundary layer. At a 135&#176; attack angle (EDT 1), the 1.0&#37; Al<sub>2</sub>O<sub>3</sub>/DW nanofluid is found to be the best-performing nanofluid in the dimpled tube, improving Nu by up to 44.56&#37;. Furthermore, ff presented an increase of 29.18&#37; when comparing ST and EDT 1 flowing 1.0&#37; Al<sub>2</sub>O<sub>3</sub>/DW at Re &#61; 2000, while total S<sub>gen</sub> is diminished by 37.75&#37; in the same conditions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.