NUMERICAL ANALYSIS OF VISCOUS FINGERING INSTABILITY DUE TO MISCIBLE DISPLACEMENT
| Autor: | H. Miri, Seyed Mostafa Hosseinalipoor, R. Azizi, arash nemati, Hamid Saffari, Behrooz Zare Vamerzani |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering Numerical analysis 02 engineering and technology Mechanics Condensed Matter Physics 01 natural sciences Instability Fractal dimension 010305 fluids & plasmas Physics::Fluid Dynamics Viscous fingering Permeability (earth sciences) Viscosity 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials 0103 physical sciences Porosity Displacement (fluid) |
| Zdroj: | Journal of Applied Mechanics and Technical Physics. 61:539-545 |
| ISSN: | 1573-8620 0021-8944 |
| DOI: | 10.1134/s0021894420040069 |
| Popis: | In this study, miscible viscous fingering instability is examined numerically by using the two-phase Darcy’s law and transport equations. The effects of the viscosity ratio, anisotropic permeability, and porosity on instabilities are investigated. The finger patterns and their splitting and spreading in the domain are discussed. An image processing algorithm is applied to concentration contours to quantify instability parameters, such as the breakthrough time, efficiency, and fractal dimension. It is revealed that more complex fingers are obtained as the viscosity ratio increases, while the efficiency and the breakthrough time decrease. It is demonstrated that high permeability perpendicular to the flow direction leads to instability intensification and to an increase in the fractal dimension, whereas changing the porosity does not have any considerable impact on viscous fingering instability. |
| Databáze: | OpenAIRE |
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