THERMAL SCIENCE

International Scientific Journal

Mohsen Talebzadegan

,

Mojtaba Moravej

,

Ehsanolah Assareh

,

Mohsen Izadi

MELTING PERFORMANCE ENHANCEMENT OF FEBRO-HYDRODYNAMIC CARREAU NON-NEWTONIAN PCM IN POROUS MEDIA: A GEOMETRICAL EVALUATION

ABSTRACT
In this paper melting of a carreau non-Newtonian PCM in the space between two concentric horizontal tubes, which is partially filled with porous material with different shapes but same area, is investigated numerically. A magnetic source is located in the center of the geometry for melting process of PCM to occur in the presence of ferro-hydrodynamic effects. Porous material is made of Cu that covers the cross-section of the inner tube. In addition, the space between inner and outer tubes is saturated with paraffin-wax PCM. Flow of melted paraffin-wax is considered as a Carreau non-Newtonian, laminar and incompressible flow with viscous dissipation that is evaluated in a specific time interval. Boussinesq approximation is valid for the PCM. Also local thermal equilibrium condition is assumed between the porous and the PCM. Galerkin finite element method has been utilized to solve the problem. Results showed that melting rate is higher for the third model in comparison other models. Also effects of the magnetic number depends on the shape of the porous medium. Therefore, that increase in the magnetic number, increasingly enhances the progress of the melting front in the second case. Moreover, effects of Carreau index, Stefan number, and porosity on the melting process are studied.
KEYWORDS
Phase change materials (PCM), porous media, Heat Transfer Enhancement, non-Newtonian fluid, magnetic field
PAPER SUBMITTED: 2021-09-12
PAPER REVISED: 2021-11-18
PAPER ACCEPTED: 2021-11-20
PUBLISHED ONLINE: 2023-02-11
DOI REFERENCE: https://doi.org/10.2298/TSCI210912016T
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 2, PAGES [1355 - 1366]
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Melting performance enhancement of febro-hydrodynamic carreau non-Newtonian PCM in porous media: A geometrical evaluation

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence