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Research shows that the nanoparticles (NPs) play an important role in reducing the interfacial tension of oil and water. However, at present, both experimental and simulation methods have some limitations in characterizing the interaction of NPs at the water-oil interface (WOIF). A new, microscale simulation method needs to be developed to characterize the effects of NPs at the WOIF. In this paper, a two-phase fluid flow model of oil and water in a single tube was established based on the lattice Boltzmann method (LBM), and the micro-migration behavior of NPs was described by Langevin dynamics (LD) method. Finally, the coupling of fluid and solid was realized by coupling two methods, and the adsorption behavior of NPs at the interface was described by setting the particle force parameters. Based on the above methods, this paper concludes that the LBM-LD coupling method can effectively simulate the movements of NPs at the water-phase and WOIF, while the transport process of NPs at the water-phase and WOIF will be significantly different due to different forces, and the adsorption of NPs at the interface can reduce the interfacial tension (IFT) significantly.

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A Hybrid Microscopic Simulation Methods for the Prediction of Water-Oil IFT of Nanofluid Displacement

  • 会议论文

  • 发表日期：

    2025年

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  • Can Ke,
  • Bin Yuan,
  • Yue Li,
  • Wei Zhang,
  • Caili Dai

摘要

Research shows that the nanoparticles (NPs) play an important role in reducing the interfacial tension of oil and water. However, at present, both experimental and simulation methods have some limitations in characterizing the interaction of NPs at the water-oil interface (WOIF). A new, microscale simulation method needs to be developed to characterize the effects of NPs at the WOIF. In this paper, a two-phase fluid flow model of oil and water in a single tube was established based on the lattice Boltzmann method (LBM), and the micro-migration behavior of NPs was described by Langevin dynamics (LD) method. Finally, the coupling of fluid and solid was realized by coupling two methods, and the adsorption behavior of NPs at the interface was described by setting the particle force parameters. Based on the above methods, this paper concludes that the LBM-LD coupling method can effectively simulate the movements of NPs at the water-phase and WOIF, while the transport process of NPs at the water-phase and WOIF will be significantly different due to different forces, and the adsorption of NPs at the interface can reduce the interfacial tension (IFT) significantly.