접촉각에 따른 다공성 구조물을 통과하는 기름-물 유동의 유수분리 영향 연구

초록

The primary objective of this study is to analyze the movement of the oil-water contact line and its effect on oil-water separation under various external pressure gradients, surface properties, and cylinder spacing. Capital a two-dimensional numerical simulation based on the Level Contour Reconstruction Method(LCRM) was conducted to investigate the two-phase(oil-water) flow through the gaps between cylinders representing mesh geometry for oil-water separation filter. The study considered a range of external pressure gradients(0 –1000 kPa/m) and cylinder spacings(100–1000 µm), with a focus on comparing two extreme surface conditions of hydrophilicity and hydrophobicity. The results demonstrate that variations in contact angle and cylinder spacing significantly influence oil-water separation efficiency. Hydrophilic surfaces maintained a stable contact line and resisted oil penetration even under increased external pressure gradient, whereas hydrophobic surfaces exhibited rapid oil infiltration due to the ease of contact line displacement. Notably, in a specific range of cylinder spacing(300 µm < d < 600 µm), hydrophilic surfaces sustained a stable separation state at much higher pressure gradient compared to hydrophobic surfaces.

키워드