Pore-scale evaluation on hydrothermal performance in a microtube with homogeneous microporous media by lattice Boltzmann method

Pore-scale evaluation on hydrothermal performance in a microtube with homogeneous microporous media by lattice Boltzmann method

This study investigates the heat transfer and flow behavior of Al2O3-water nanofluid in micro-scale systems, using the lattice Boltzmann method (LBM) for numerical simulations. To implement the LBM code, FORTRAN home-made programming is employed. The research focuses on a three-dimensional microtube...

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Bibliographic Details
Main Authors: Saboura Yousefi, Mostafa Mahdavi, Seyed Soheil Mousavi Ajarostaghi, Mohsen Sharifpur, Magda Abd El-Rahman
Format: Article
Language:English
Published: Elsevier 2025-03-01
Series:Results in Physics
Subjects:
Microtube
Lattice Boltzmann Method (LBM)
Microporous
Pore-Scale Modeling
Nanofluid
Hydrothermal
Online Access:http://www.sciencedirect.com/science/article/pii/S221137972500049X
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Summary:This study investigates the heat transfer and flow behavior of Al2O3-water nanofluid in micro-scale systems, using the lattice Boltzmann method (LBM) for numerical simulations. To implement the LBM code, FORTRAN home-made programming is employed. The research focuses on a three-dimensional microtube (500 μm diameter and 6,000 μm length) subjected to a uniform wall heat flux, with Reynolds numbers between 40 and 100. Spherical particles of varying sizes and quantities are introduced into the flow path to investigate the impact of porosity on thermophysical properties. The study explores the relatively unexamined application of the LBM to curved boundaries. Results indicate that introducing 6–10 spherical objects at Re = 40 increases the average Nusselt number by about 23.61 % and 25.83 %, respectively, whereas larger spheres in smaller quantities exhibit minimal or negative effects on heat transfer. Although the lattice Boltzmann method is gaining traction in fluid dynamics, its application to curved boundaries remains limited. This study advances the field by analyzing flow dynamics in a microtube with spherical inserts, integrating curved boundaries, nanofluids, and porous structures, thereby providing valuable insights into thermophysical studies.
ISSN:2211-3797

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