Non-Newtonian behavior of an electrical and magnetizable phase change material in a filled enclosure in the presence of a non-uniform magnetic field. (January 2020)

• Record Type: Journal Article
• Authors: Ghalambaz, Mohammad; Hashem Zadeh, Seyed Mohsen; Mehryan, S.A.M.; Ayoubi Ayoubloo, Kasra; Sedaghatizadeh, Nima
• Is Part Of: International communications in heat and mass transfer. Volume 110(2020:Jan.)
• Publication Date: 2020-01
• Subjects: Non-Newtonian phase change material (PCM) -- Non-uniform magnetic field -- Deformed mesh technique -- Magneto hydrodynamic (MHD) -- Ferro hydrodynamic (FHD); Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Heat -- Transmission; Mass transfer; Periodicals; 621.4022
• DOI: 10.1016/j.icheatmasstransfer.2019.104437
• Languages: English
• ISSNs: 0735-1933

Abstract

Abstract: This work aims to study the non-Newtonian behavior of a magneto- and ferro-hydrodynamic phase change material (PCM) inside a differentially heated enclosure. The enclosure is occupied with a Power-law non-Newtonian PCM, and a non-uniform magnetic field is imposed on the adjacent hot wall. The left and right of the enclosure are subjected to the high and cold temperatures, and the top and bottom of the enclosure are insulated. A deformed mesh technique along with the Stephan condition is applied to track the interface of the solid and molten regions. The impacts of the alterable parameters including the Rayleigh number (10 4 < Ra < 10 6 ), the Power-law index (0.7 < n < 1), the Hartman number (0 < Ha < 250) and the magnetic parameter (0 < Mn f < 7000) on the melting front, normalized melt volume fraction (NMVF), and the Nusselt number are studied. The simulation shows that a decrease in the Power-law index can significantly increase the melting rate. In addition to this, results show that augmentation of the Hartman number and magnetic parameter weakens and enhances the NMVF, respectively.