Water transport at the nanoscale is a significant phenomenon related to unconventional hydrocarbon production. This study develops a new model of the lattice Boltzmann method to simulate the nanoconfined water transport through a rough pore. The proposed model considers the interface viscosity and the slip length according to the surface wettability. Water flow simulations are conducted to analyze the flow characteristics and the transport capacity under various wettability and surface roughness conditions. Results show that the fluid velocity and pressure distributions along the flow direction are profoundly affected by the rough surface. As the contact angle increases, the transport capacity has a minor increase in the hydrophilic condition, but a significant rise in the hydrophobic state. Also, with the increase of relative surface roughness, the transport capacity for the hydrophobic rough nanopore is greatly enhanced, while for the hydrophilic pores, only a minor variation is observed. The dimensionless liquid permeability gradually decreases as the relative surface roughness increases irrespective of the wettability. However, the fractal dimension of the rough surface rarely affects both the transport ability and the dimensionless permeability. Finally, this study presents an empirical permeability estimation model for rough nanopores.

纳米级的水传输是与非常规烃生产有关的重要现象。这项研究开发了一种新的格子玻尔兹曼方法模型，以模拟通过粗糙孔隙的纳米约束水的传输。提出的模型根据表面润湿性考虑了界面粘度和滑移长度。进行水流模拟以分析在各种润湿性和表面粗糙度条件下的流动特性和输送能力。结果表明，沿流动方向的流体速度和压力分布受粗糙表面的影响很大。随着接触角的增加，运输能力在亲水条件下略有增加，但在疏水状态下显着提高。而且，随着相对表面粗糙度的增加，疏水性粗糙纳米孔的传输能力大大增强，而亲水性孔仅观察到很小的变化。不管润湿性如何，随着相对表面粗糙度的增加，无量纲的液体渗透性逐渐降低。但是，粗糙表面的分形维数几乎不会影响传输能力和无因次渗透率。最后，本研究提出了粗糙纳米孔的经验渗透率估算模型。粗糙表面的分形维数很少影响传输能力和无因次渗透率。最后，本研究提出了粗糙纳米孔的经验渗透率估算模型。粗糙表面的分形维数很少影响传输能力和无因次渗透率。最后，本研究提出了粗糙纳米孔的经验渗透率估算模型。