热渗透理论与模拟的比较
Comparing Theory and Simulation for Thermo-osmosis
摘要：
我们报告了热渗透滑移，即沿固体-流体界面的热梯度引起的粒子通量的数值研究。为了便于与理论进行比较，我们考虑一个理想但粘性气体的模型。我们比较了三个数值路线，以获得滑移系数：1。使用Onsager互惠关系2.通过使用适当的Green-Kubo关系3.通过过量焓。数值结果是相互一致的，并同意基于流体力学和热力学是局部有效的假设的理论预测。
英文摘要：
We report a numerical study of thermo-osmotic slip, i.e. the particle flux induced by a thermal gradient along a solid-fluid interface. To facilitate comparison with theory, we consider a model of an ideal but viscous gas. We compare three numerical routes to obtain the slip coefficient: 1. by using the Onsager reciprocity relations 2. by using the appropriate Green-Kubo relation 3. via the excess enthalpy. The numerical results are found to be mutually consistent, and to agree with the theoretical prediction based on the assumption that hydrodynamics and thermodynamics are locally valid.
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