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磁流体各向异性导热的研究

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摘要 考虑磁流体中粒子受力及运动特性,运用数值模拟方法研究了外加磁场作用下磁流体的三维微观结构.建立磁流体各向异性导热系数的预测方法,分析计算在不同外加磁场作用下磁流体的导热系数.引入表示粒子非均匀分布结构特征的结构各向异性参数,修正Maxwell公式,将该公式拓展应用于计算磁流体各向异性导热系数.结果表明:当外加磁场作用时,磁流体中粒子沿磁场方向形成链状结构,磁流体沿着链向的导热系数要大于其他方向的导热系数,导热系数表现出各向异性特征.且随着磁场强度的增大,磁流体内的链状结构变得更加明显,导热的各向异性特征更加明显.
出处 《自然科学进展》 北大核心 2008年第12期1459-1466,共8页
基金 国家自然科学基金资助项目(批准号:50436020)
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