The present work is an effort to find a feasible design proposal which can ensure the continuous flow and self-sustained heat transfer within a circular annulus, solely because of magnetic forces. The objective is to study the change in flow characteristics because of magnetocaloric response of the nanoparticles used. In the present work, Mean Field Theory is used to calculate the specific magnetization and an improved viscosity model is used for considering its dependency on applied magnetic field. For better accuracy, individual mechanisms are considered while calculating the specific heat of magnetocaloric material. To have a better understanding, three different values of the remanent flux density () and three distinct geometrical configurations are compared for their flow and thermal characteristics. For all cases, a periodic clockwise rotation of the fluid is observed and it is noticed that, the frequency of this rotation varies with both geometrical dimensions and . The main purpose of the current analysis is to contribute the preliminary data, which will further enhance our understanding about applications of Thermo-Magnetic Convection and Magnetocaloric Effect in heat transport devices.

中文翻译：

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充满磁热纳米流体的圆环中的热磁对流


目前的工作是努力寻找一种可行的设计方案，仅通过磁力即可确保圆形环空内的连续流动和自持传热。目的是研究由于所用纳米颗粒的磁热响应而导致的流动特性的变化。在目前的工作中，平均场理论用于计算比磁化强度，并使用改进的粘度模型来考虑其对施加磁场的依赖性。为了获得更高的准确性，在计算磁热材料的比热时考虑了各个机制。为了更好地理解，比较了三个不同的剩余磁通密度 () 值和三种不同的几何配置的流动和热特性。对于所有情况，都会观察到流体的周期性顺时针旋转，并且注意到，该旋转的频率随着几何尺寸 和 的变化而变化。当前分析的主要目的是提供初步数据，这将进一步加深我们对热磁对流和磁热效应在传热装置中应用的理解。