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Pore-scale simulation on distribution characteristics of spilled oil and associated energy conversion process
发表时间：2025-08-01
  • 发表刊物：
    Journal of Hydrology
  • 关键字：
    Oil invasion, Flow pathway, Residual ganglia, Energy conversion
  • 摘要：
    Understanding the migration behaviors of spilled oil in soil is fundamentally important for taking appropriate remediation measures after a leakage accident. Yet, most previous studies, which have been performed on a field-scale, are unable to reveal the flow behaviors of spilled oil within the soil pores and thus the accurate transport mechanism underlying the oil invasion process. Focusing on the interfaces between the invading oil, resident water, and the solid boundaries within a heterogeneous porous media, this study systematically investigates the evolving dynamics and the dependence on capillary number (Ca), viscosity ratio (M) and wettability using a phase-field method. The results show that the residual water saturation is reversely correlated with each of the three factors. The morphology of residual water ganglia is more subjected to Ca than to M. As Ca decreases, the main form of water ganglia turns from isolated drops and columns to be clusters with larger areas. The dependency of the ganglia characteristics (i.e., number, mean area) on the Ca remains constant under different wettabilities. During the oil invasion, the external work is transformed into surface, dissipated and kinetic energy. The ultimate oil saturation is in line with the dissipated energy ratio in response to Ca changes. This study provides pore-scale insights into the migration behaviors of spilled oil as well as the governing mechanism, which helps to fill the gap left by the field-scale studies and to develop better remediation measures.
  • 全部作者：
    Yinglong Zhang,Pei Zhao,Zeyad Almutairi,Xiaodai Xue,Yan Zhou,Gongming Xin
  • 第一作者：
    Zhennan He
  • 论文类型：
    期刊论文
  • 通讯作者：
    Ning Qin
  • 论文编号：
    134050
  • 卷号：
    662
  • 页面范围：
    134050
  • 是否译文：
    否
  • 发表时间：
    2025-08-01
  • 收录刊物：
    SCI
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