Journal
CHEMICAL ENGINEERING JOURNAL
Volume 395, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125053
Keywords
Two-phase flow; Nanochannels; Liquid-liquid slip; Analytical model
Categories
Funding
- China Scholarship Council (CSC)
- Westgrid
- Compute Canada
- National Science Foundation [51974348, 51804328, 51974347, 51904324]
- National Science and Technology Major Project of China [ZD2019-183-007]
- Opening Fund of Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education
- Fundamental Research Funds for the Central Universities [19CX05005A-1]
- Graduate Innovation Project of China University of Petroleum (East China) [YCX2018017]
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2017-05080]
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Multiphase flow in nanoporous media is ubiquitous in geophysics, physical chemistry, and bioengineering. The underlying mechanisms of two-phase flow are of great importance in the prediction of water and oil flow in shale nanoporous media. In this work, we use molecular dynamic simulations to investigate a laminar type oil-water two-phase flow (OW2PF) in quartz nanopores. We find that in nanochannels, due to liquid-liquid slip, the enhancement in oil phase flow may not be neglected. As water film thickness and pore size increase, such enhancement decreases gradually. According to MD results, a new hydrodynamic flow model considering fluid distributions, heterogeneous fluid properties, liquid-wall interaction, and liquid-liquid slip is proposed and compared to MD results and other hydrodynamic flow models. While previous hydrodynamic flow models generally underestimate oil phase flow in a laminar type OW2PF in quartz nanopores, our model shows an excellent agreement with MD simulations for a wide range of pore sizes. Our work could shed some lights into flow mechanism of a laminar type OW2PF in nanoporous media and provide insights into flow modeling development in shale oil exploitation.
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