Numerical study and geometrical investigation of the position of alternated fins mounted in channels subjected to forced convective flows

Authors

DOI:

https://doi.org/10.5902/2179460X87145

Keywords:

Forced convection, Finned channels, Geometrical investigation, Computational modeling

Abstract

The present numerical study aims to investigate the geometry of an arrangement of isothermal rectangular fins, mounted in alternating form in the lower and upper surfaces of microchannels, subjected to laminar, incompressible, and forced convective flows in a two-dimensional domain. The main purpose is maximizing the efficiency and the heat transfer rate among the fins and the fresh flow in the channel, and minimizing the pressure drop in the finned channel. It is investigated here one degree of freedom (L1/L) that represents the distance between the first and second fins of the arrangement. The remaining degrees of freedom are kept constant (L2/L and L3/L). All numerical simulations were performed considering air as a working fluid for Reynolds and Prandtl numbers of ReH = 100 and Pr = 0.71. The best thermal performance of the arrangement was achieved for the extreme ratios of L1/L, i.e., when the second fin was mounted near the first or third fins. A small advantage is noticed for the lowest magnitude of L1/L in comparison with the other extreme position. The difference between the best and worst thermal performance, measured by the heat transfer rate, was nearly 23%. For the pressure drop, an intermediate ratio L1/L = 0.4 was conducted to get the best fluid dynamic performance.

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Author Biographies

Eliézer Lavall Lopes, Universidade Federal do Rio Grande

Studying Mechanical Engineering at the Federal University of Rio Grande (FURG). Computer Technician for the Internet graduated from the Federal Institute of Education, Science and Technology of Rio Grande do Sul Campus Rio Grande (IFRS).

Andrei Luis Garcia Santos, Universidade Federal do Rio Grande

Graduated in Mechanical Engineering from the Federal University of Rio Grande - FURG (2010), he holds a master's degree in Ocean Engineering from the Federal University of Rio Grande - FURG (2018). Currently, PhD student in the graduate program in Computational Modeling - FURG. Professional experience in the areas of mechanical maintenance in the rice processing industry, planning, field engineering and commissioning in the construction and assembly of the shipbuilding industry. Currently, he works in the field of wind farm projects.

Luiz Alberto Oliveira Rocha, Universidade Federal do Rio Grande

Holds a bachelor's degree in Automotive Mechanical Engineering from the Military Institute of Engineering (1991), a master's degree in Mechanical Engineering from the Pontifical Catholic University of Rio de Janeiro (1995), a PhD in Mechanical Engineering from Duke University (2002) and a postdoctoral degree in the area of Turbulence from the Institute of Hydraulic Research/UFRGS/RS (2006). He has experience in the area of Mechanical Engineering, with emphasis on Thermodynamics, Fluid Mechanics and Heat Transfer, working mainly on the following topics: Geometric Optimization, Energy and Exergy Analysis, Alternative/Renewable Energies, Constructal Theory and Design, Modeling, Simulation and Optimization of Systems. He is currently a visiting professor in the PPGs of Mechanical Engineering at UFRGS, Computational Modeling and Ocean Engineering at FURG, and also works as a collaborating researcher at the Laboratory of Complex Flow Systems at the Institute of Earth Sciences of the University of Évora in Portugal.

Liércio André Isoldi, Universidade Federal do Rio Grande

Holds a Technical Course in Mechanics from the Federal Technical School of Pelotas (1993), a Bachelor's Degree in Mechanical Engineering from the Federal University of Rio Grande (1999), a Bachelor's Degree in Civil Engineering from the Federal University of Rio Grande (1999), a Master's Degree in Ocean Engineering (PPGEO) from the Federal University of Rio Grande (2002), a PhD in Engineering (PROMEC) from the Federal University of Rio Grande do Sul (2008) and a Post-Doctorate linked to the Graduate Program in Computational Modeling (PPGMC) of the Federal University of Rio Grande (2009). He is currently Associate Professor IV (40h - DE) at the School of Engineering (EE) of the Federal University of Rio Grande (FURG), Permanent Professor of the Graduate Program in Computational Modeling (PPGMC-FURG) and the Graduate Program in Ocean Engineering (PPGEO-FURG). 

Elizaldo Domingues dos Santos, Universidade Federal do Rio Grande

Holds a bachelor's degree in Mechanical Engineering from the Federal University of Rio Grande (2004), a master's degree from the Federal University of Rio Grande do Sul (2007) and a PhD from the Federal University of Rio Grande do Sul (2011). He has experience in the field of mechanical engineering with emphasis on fluid mechanics, heat transfer, thermodynamics, computational fluid dynamics, renewable energy sources and design. He is currently an Associate Professor IV at the Federal University of Rio Grande (FURG) and permanent professor of the Graduate Programs in Computational Modeling (PPGMC) and Ocean Engineering (PPGEO).

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Published

2024-11-04

How to Cite

Lopes, E. L., Santos, A. L. G., Rocha, L. A. O., Isoldi, L. A., & Santos, E. D. dos. (2024). Numerical study and geometrical investigation of the position of alternated fins mounted in channels subjected to forced convective flows. Ciência E Natura, 46(esp. 1), e87145. https://doi.org/10.5902/2179460X87145

Issue

Vol. 46 No. esp. 1 (2024): ERMAC e ENMC

Section

Special Edition 1

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