Abstract
AbstractIn this work, we study a heat transfer in the three‐dimensional magnetic cooling cell involving microwires of NiMnIn 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 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.
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