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

IF 4.4 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics Pub Date : 2025-02-12 DOI:10.1016/j.rinp.2025.108155

Saboura Yousefi , Mostafa Mahdavi , Seyed Soheil Mousavi Ajarostaghi , Mohsen Sharifpur , Magda Abd El-Rahman

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Abstract

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.

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来源期刊

Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY

CiteScore

8.70

自引率

9.40%

发文量

754

审稿时长

50 days

期刊介绍： Results in Physics is an open access journal offering authors the opportunity to publish in all fundamental and interdisciplinary areas of physics, materials science, and applied physics. Papers of a theoretical, computational, and experimental nature are all welcome. Results in Physics accepts papers that are scientifically sound, technically correct and provide valuable new knowledge to the physics community. Topics such as three-dimensional flow and magnetohydrodynamics are not within the scope of Results in Physics. Results in Physics welcomes three types of papers: 1. Full research papers 2. Microarticles: very short papers, no longer than two pages. They may consist of a single, but well-described piece of information, such as: - Data and/or a plot plus a description - Description of a new method or instrumentation - Negative results - Concept or design study 3. Letters to the Editor: Letters discussing a recent article published in Results in Physics are welcome. These are objective, constructive, or educational critiques of papers published in Results in Physics. Accepted letters will be sent to the author of the original paper for a response. Each letter and response is published together. Letters should be received within 8 weeks of the article''s publication. They should not exceed 750 words of text and 10 references.