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Modeling of heat transfer processes in Ni 2 MnIn magnetic wires
Author(s) -
Pavlukhina Oksana,
Sokolovskiy Vladimir,
Buchelnikov Vasiliy
Publication year - 2016
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201532584
Subject(s) - coolant , magnetic refrigeration , materials science , heat transfer , condensed matter physics , thermodynamics , magnetic field , work (physics) , alloy , mechanics , magnetization , composite material , physics , quantum mechanics
In this work, we study a heat transfer in the three‐dimensional magnetic cooling cell involving microwires of Ni2 MnIn Heusler alloy. Thermophysical properties of microwires such as the heat capacity, magnetic part of entropy, and magnetocaloric effect were investigated by means of Monte Carlo simulations with parameters taken from ab initio calculations as input. The diameter of the magnetic wires was varied from 10 to 50 μ m while the length was fixed to 1 mm. The system is supplied a coolant water flow at a constant speed and temperature. We have shown that the cooling power depends on the magnetic wire thickness and the coolant flow rate. The relaxation times of the temperature of wires, the temperature distribution in the magnetic wires and coolant, as well as the velocity fields of a coolant in the cell were calculated.