Natural convection characteristics of nano-encapsulated phase change materials in a rectangular wavy enclosure with heating element and under an external magnetic field

Anas Alazzam*, Naef A.A. Qasem, Abderrahmane Aissa, Mohamed Salah Abid, Kamel Guedri, Obai Younis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Recently, nano-encapsulated phase change material (NEPCM) has received great attention due to its ability to absorb and release heat, making it a perfect choice for many engineering and industrial applications. The current work examines the natural convection of NEPCM confined in a cubic enclosure having two wavy sidewalls and under the effect of an external magnetic field. The enclosure is heated from below via a duct or cavity having a U shape; both wavy sidewalls experience cold temperatures, and the other walls are thermally insulated. The impacts of different operational and geometrical parameters on heat transfer inside the enclosure were numerically investigated. These parameters include the external magnetic field applied, Rayleigh number (Ra), sidewall wavenumber (N), Hartmann number (Ha), nanoparticle volume fraction (φ), and heat source position. Heat transfer within the enclosure was found to be most affected by the Ra and Ha numbers, while the other factors studied had little to no effect. The maximum local Nusslet number at Ra = 106 was four times greater than that at Ra = 103. As for the effect of the Ha number, increasing Ha from 0 to 100 decreased the average Nusselt number by 38 %.

Original languageEnglish
Article number106213
JournalJournal of Energy Storage
Volume57
DOIs
StatePublished - Jan 2023

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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