蒸发水界面处的温度间断
On temperature discontinuity at an evaporating water interface
摘要：
蒸发质量通量受汽液相界面状态的影响。对于非常相似的压力和质量通量的液态水到自己的蒸汽，界面之间的液体和蒸汽温度在0.14-28 K的范围内的不连续性的报告。这种有争议的不连续性导致了对蒸发的理解和理论模拟的障碍。在这里，通过研究气相输运的玻尔兹曼输运方程求解通过直接模拟蒙特卡罗方法，我们证明了测量的不连续性的强烈影响的边界条件上的蒸汽侧的界面，并不反映界面状态。所有这些研究的蒸发界面上的温度不连续性< 0.1 K。为了准确地捕捉界面状态，蒸汽热通量应被抑制。
英文摘要：
Evaporative mass flux is governed by interfacial state of liquid and vapor phases. For closely similar pressures and mass fluxes of liquid water into its own vapor, discontinuity between interfacial liquid and vapor temperatures in the range of 0.14-28 K is reported. This controversial discontinuity has resulted in an obstacle on understanding and theoretical modeling of evaporation. Here, through study of vapor transport by Boltzmann transport equation solved through Direct Simulation Monte Carlo Method, we demonstrated that the measured discontinuities were strongly affected by boundary condition on the vapor side of the interface and do not reflect the interfacial state. The temperature discontinuity across the evaporating interface is < 0.1 K for all these studies. To accurately capture the interfacial state, the vapor heat flux should be suppressed.
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