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Disjoining Pressure of Water in Nanochannels
Nano Letters ( IF 9.6 ) Pub Date : 2021-08-30 , DOI: 10.1021/acs.nanolett.1c02726 An Zou 1 , Sajag Poudel 1 , Manish Gupta 1 , Shalabh C Maroo 1
Nano Letters ( IF 9.6 ) Pub Date : 2021-08-30 , DOI: 10.1021/acs.nanolett.1c02726 An Zou 1 , Sajag Poudel 1 , Manish Gupta 1 , Shalabh C Maroo 1
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The disjoining pressure of water was estimated from wicking experiments in 1D silicon dioxide nanochannels of heights of 59, 87, 124, and 1015 nm. The disjoining pressure was found to be as high as ∼1.5 MPa while exponentially decreasing with increasing channel height. Such a relation resulting from the curve fitting of experimentally derived data was implemented and validated in computational fluid dynamics. The implementation was then used to simulate bubble nucleation in a water-filled 59 nm nanochannel to determine the nucleation temperature. Simultaneously, experiments were conducted by nucleating a bubble in a similar 58 nm nanochannel by laser heating. The measured nucleation temperature was found to be in excellent agreement with the simulation, thus independently validating the disjoining pressure relation developed in this work. The methodology implemented here integrates experimental nanoscale physics into continuum simulations thus enabling numerical study of various phenomena where disjoining pressure plays an important role.
中文翻译：
纳米通道中水的分离压力
水的分离压力是通过高度为 59、87、124 和 1015 nm 的一维二氧化硅纳米通道中的芯吸实验估算的。发现分离压力高达~1.5 MPa，同时随着通道高度的增加呈指数下降。这种由实验数据的曲线拟合得出的关系在计算流体动力学中得到了实现和验证。然后使用该实现来模拟充满水的 59 nm 纳米通道中的气泡成核，以确定成核温度。同时，通过激光加热在类似的 58 nm 纳米通道中使气泡成核来进行实验。发现测量的成核温度与模拟非常一致，从而独立验证了本工作中开发的分离压力关系。这里实现的方法将实验纳米级物理集成到连续介质模拟中，从而能够对分离压力发挥重要作用的各种现象进行数值研究。
更新日期：2021-09-22
中文翻译：
纳米通道中水的分离压力
水的分离压力是通过高度为 59、87、124 和 1015 nm 的一维二氧化硅纳米通道中的芯吸实验估算的。发现分离压力高达~1.5 MPa，同时随着通道高度的增加呈指数下降。这种由实验数据的曲线拟合得出的关系在计算流体动力学中得到了实现和验证。然后使用该实现来模拟充满水的 59 nm 纳米通道中的气泡成核，以确定成核温度。同时，通过激光加热在类似的 58 nm 纳米通道中使气泡成核来进行实验。发现测量的成核温度与模拟非常一致，从而独立验证了本工作中开发的分离压力关系。这里实现的方法将实验纳米级物理集成到连续介质模拟中，从而能够对分离压力发挥重要作用的各种现象进行数值研究。
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