Direct numerical simulation of pore scale particle-water-oil transport in porous media

Su, Jun-Wei; Chai, Guoliang; Wang, Le; Cao, Weidong; Yu, Jia; Gu, Zhaolin; Chen, Chungang

doi:10.1016/j.petrol.2019.04.078

Cited by 27 publications

(30 citation statements)

References 39 publications

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“…Average pore water velocity v refers to the effective water flux of soil (i.e, the volume of liquid flowing through the unit cross section in unit time; Su et al, 2019). According to Table 2, the TRM fitting value of group v in the CG was 0.955 cm h −1 .…”

Section: Characteristics Of Parameter Variation In Two-zone Modelmentioning

confidence: 99%

Soil infiltration and conservative solute transport characteristics with different viscosity of hydroxypropyl methyl cellulose

Ren

Shao

et al. 2020

Soil Science Soc of Amer J

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Hydroxypropyl methyl cellulose (HPMC), a potential soil improver with the ability to hold water, has practical applicability in alleviating soil and water nutrient loss. By using Cl− as tracer ions, we evaluated the effects of different HPMC viscosities on soil water infiltration characteristics and conservative solute migration characteristics. Hydroxypropyl methyl cellulose with viscosities of 2 × 104, 6 × 104, 10 × 104, and 20 × 104 mPa s−1 was selected. Experimental results revealed that the cumulative infiltration amount, wetting front migration distance, and infiltration rate decreased significantly with increased HPMC viscosity. The addition of HPMC delayed the soil solute transport process, and HPMC with a higher viscosity caused greater soil solute transport delay. Both the convection‐dispersion equation (CDE) and the two‐region model (TRM) accurately simulated solute transport, but the simulation accuracy of the TRM was higher. Results of parametric fitting based on the TRM indicated that the average pore water velocity, hydrodynamic dispersion coefficient, and dispersion degree decrease with increased HPMC viscosity. The average pore water velocity decreased by 13.6–28.2% relative to the control group (CG). Compared with the CG, the water content ratio in movable water of HPMC groups changed irregularly with an increase in viscosity. The mass exchange coefficient increased significantly compared with the CG, with an irregular trend. These data will be useful in the application and promotion of HPMC as a soil improver.

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Section: Characteristics Of Parameter Variation In Two-zone Modelmentioning

confidence: 99%

Soil infiltration and conservative solute transport characteristics with different viscosity of hydroxypropyl methyl cellulose

Ren

Shao

et al. 2020

Soil Science Soc of Amer J

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show abstract

“…Equations (11) and (12) contain the integrals of physical quantities on the particle domain. As a DNS (direct numerical simulation) method, the faces of background mesh cells do not coincide with the particle surface during the solving procedure, so it is necessary to use an approximation method to deal with the interface area.…”

Section: Calculation Of Integral Of Particle Domainmentioning

confidence: 99%

“…With the development of the computer, computational fluid dynamics (CFD) has become an important method to study the moving boundary problems. At present, the numerical simulation methods for moving boundary problems can be divided into the point-source method [1][2][3] and direct numerical simulation method [4][5][6][7][8][9][10][11][12][13][14][15]. In the point-source method, fluid-solid interactions are evaluated through point source models (drag model, lift model, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…This situation is beyond the scope of this work. Direct numerical simulation techniques include arbitrary Lagrange-Euler (ALE) [4][5][6] and fixed mesh method [7][8][9][10][11][12][13][14][15]. For ALE, body-fitted mesh is usually applied, and the force and moment of fluid acting on the solid are integrated by the force on the boundary; then, the solid is moved and rotated by tracking the dynamic process and kinematics equation of the solid; finally, the fluid mesh is adjusted to calculate the flow for the next moment.…”

Section: Introductionmentioning

confidence: 99%

“…For the fixed mesh method, the fluid mesh does not change during the solution procedure, and the behaviour of fluid is changed in the solid domain or solid boundary-covered mesh to indicate the effects of the solid on the flow. The immersed boundary method [7,8] and fictitious domain method [9][10][11][12][13][14][15] belong to such methods. These methods avoid complicated mesh operations, and thus it has become an important method of dealing with moving boundary problems in recent years [16].…”

Section: Introductionmentioning

confidence: 99%

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Improving the Accuracy of Fictitious Domain Method Using Indicator Function from Volume Intersection

Chai

Wang

et al. 2019

Advances in Mathematical Physics

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Fictitious domain method (FDM) is a commonly accepted direct numerical simulation technique for moving boundary problems. Indicator function used to distinguish the solid zone and the fluid zone is an essential part concerning the whole prediction accuracy of FDM. In this work, a new indicator function through volume intersection is developed for FDM. In this method, the arbitrarily polyhedral cells across the interface between fluid and solid are located and subdivided into tetrahedrons. The fraction of the solid volume in each cell is accurately computed to achieve high precision of integration calculation in the particle domain, improving the accuracy of the whole method. The quadrature over the solid domain shows that the newly developed indicator function can provide results with high accuracy for variable integration in both stationary and moving boundary problems. Several numerical tests, including flow around a circular cylinder, a single sphere in a creeping shear flow, settlement of a circular particle in a closed container, and in-line oscillation of a circular cylinder, have been performed. The results show good accuracy and feasibility in dealing with the stationary boundary problem as well as the moving boundary problem. This method is accurate and conservative, which can be a feasible tool for studying problems with moving boundaries.

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Direct numerical simulation of pore scale particle-water-oil transport in porous media

Cited by 27 publications

References 39 publications

Soil infiltration and conservative solute transport characteristics with different viscosity of hydroxypropyl methyl cellulose

Soil infiltration and conservative solute transport characteristics with different viscosity of hydroxypropyl methyl cellulose

Improving the Accuracy of Fictitious Domain Method Using Indicator Function from Volume Intersection

Design, Simulation and Test of Thermal Control System of Centrifuge for Space Utilization

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