建立了描述外磁场作用下温度敏感型磁流体热磁对流特性的数学模型,数值模拟了回路中热磁对流的流动与传热特性.搭建了磁流体热磁对流回路装置,采用粒子示踪测速技术(PIV)测量了磁流体的流速,用热电偶测量了磁流体的温度分布.通过实验值和数值模拟结果,分析了不同磁场大小、不同热负荷,以及不同冷却温度下回路的运行特性.
A mathematical model is established for investigating the characteristics of thermomag- netic convection in the temperature-sensitive magnetic fluid in the presence of an external magnetic field.The flow and heat transport features of the thermomagnetic convection in a loop-shape channel is numerically simulated.A practical system for producing thermomagnetic convection circulation in a loop is fabricated.Experimental measurements are carried out with particle image velocimetry (PIV)for fluid flow and thermocouples with temperatures.Performance of the loop in different operation conditions including magnetic field intensity,input heat load and heat sink temperature were discussed based on the experimental observations and numerical results.
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