通过连续局部混合和热化的热传导和傅立叶定律
Heat conduction and Fourier's law by consecutive local mixing and thermalization
摘要：
我们提出了第一性原理研究热传导的一类模型，表现出一个新的多步局部热化机制，从而产生傅立叶定律。在我们的模型中，局部热化是局部受限气体粒子之间的二元碰撞的结果。我们探讨的条件下，放松到局部平衡，其中不涉及能量交换，发生的时间尺度短于二进制碰撞诱导局部热化。讨论了这种机制在气凝胶等多相材料体系中的作用。
英文摘要：
We present a first-principles study of heat conduction in a class of models which exhibit a new multi-step local thermalization mechanism which gives rise to Fourier's law. Local thermalization in our models occurs as the result of binary collisions among locally confined gas particles. We explore the conditions under which relaxation to local equilibrium, which involves no energy exchange, takes place on time scales shorter than that of the binary collisions which induce local thermalization. The role of this mechanism in multi-phase material systems such as aerogels is discussed.
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