随着空间尺度的缩小,界面对导热的影响就会越来越明显.本文采用非平衡分子动力学模拟方法模拟了壁面的粗糙度对面向导热的影响,并给出微尺度下的粗糙度定义.在模拟中构造了不同的壁面粗糙度,得到了面向热导率随着壁面粗糙度增加而减小的结果.分析认为壁面的镜面反射率随着粗糙度增加而减小,而镜面反射率减小将导致热导率下降.
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