TY - JOUR
TI - Melting performance enhancement of febro-hydrodynamic carreau non-Newtonian PCM in porous media: A geometrical evaluation
AU - Talebzadegan Mohsen
AU - Moravej Mojtaba
AU - Assareh Ehsanolah
AU - Izadi Mohsen
JN - Thermal Science
PY - 2023
VL - 27
IS - 2
SP - 1355
EP - 1366
PT - Article
AB - 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.