Oil Displacement by the Magnetic Fluid Inside a Cylindrical Sand-Filled Sample: Experiments and Numerical Simulations

Dou, Xiaoxiao; Chen, Zhewen; Cao, Xiaojian; Ma, Chicheng

doi:10.1021/acsomega.2c02444

Cited by 5 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the problem of measuring the effective extraction radius of boreholes, scholars have studied these through theoretical analysis, , numerical simulation, , and field experiments. , In terms of numerical simulation, various scholars worldwide have studied the gas-structure interaction model of gas-containing coal and the factors affecting the effective extraction radius. Liang established a gas-structure coupling model based on the deformation characteristics of the coal skeleton and the adsorption and desorption characteristics of gas.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the problem of measuring the effective extraction radius of boreholes, scholars have studied these through theoretical analysis, 10 , 11 numerical simulation, 12 , 13 and field experiments. 14 , 15 In terms of numerical simulation, various scholars worldwide have studied the gas-structure interaction model of gas-containing coal and the factors affecting the effective extraction radius.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on Effective Extraction Radius of Directional Long Borehole and Analysis of the Influence Mechanism

et al. 2023

ACS Omega

View full text Add to dashboard Cite

To accurately determine the effective extraction radius of directional long drilling, the influence of the negative pressure of the hole mouth, the drilling diameter, and the drilling length of the hole on the effective extraction radius of a directional long drilling hole is simulated by establishing a coal-to-gas gas-structure coupling model considering the Klinkenberg effect. Finally, the reliability of the numerical simulation is verified through field testing in Yuxi Coal Mine. The results reveal that the attenuation of negative pressure in a directional long borehole along a long hole has a significant influence on the gas extraction effect. The radial gas pressure of the extraction drilling hole is distributed in a “V” shape when the negative pressure of the extraction decays along the direction of the hole length. The higher the negative pressure and the longer the diameter of the drilling hole, the higher is the gas extraction effect. The effective extraction radius is exponentially related to the drilled hole depth when the negative pressure of extraction is attenuated along the long hole direction. The negative pressure of the hole and the diameter of the borehole are linearly related to the effective extraction radius at the depth of drilling hole of 430 m. Through field tests, while extracting for 180 days based on the stubble pressing effect, the effective extraction radius of the directional long borehole of the No. 3 coal seam of Yuxi Coal Mine is 5.7 m, and the absolute error between the numerical simulation is 0.1 m. In addition, the gas pressure obtained from different sampling points is consistent with the numerical simulation. The relative error is 0.3–4.1%. The results provide a theoretical basis for the rational layout of directional drilling.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Effective Extraction Radius of Directional Long Borehole and Analysis of the Influence Mechanism

et al. 2023

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Similarly, experiments on the internal convection of ferrofluids flowing through a capillary tube filled with porous media showed that external fields could significantly enhance the thermal conductivity [13]. Also the efficiency of ferrofluids for oil displacements in a sand-filled pipe was investigated experimentally and compared to finite-element simulations [14].…”

Section: Introductionmentioning

confidence: 99%

Simulating the flow of interacting ferrofluids with multiparticle collision dynamics

Ilg

2022

Phys. Rev. E

View full text Add to dashboard Cite

Ferrofluid flow is fascinating since their fluid properties can conveniently be manipulated by external magnetic fields. Novel applications in micro-and nanofluidics as well as in biomedicine have renewed the interest in the flow of colloidal magnetic nanoparticles with a focus on small-scale behavior. Traditional flow simulations of ferrofluids, however, often use simplified constitutive models and do not include fluctuations that are relevant at small scales. Here, we address these challenges by proposing a hybrid scheme that combines the multi-particle collision dynamics method for modelling hydrodynamics with Brownian Dynamics simulations of a reliable kinetic model describing the microstructure, magnetization dynamics and resulting stresses. Since both, multi-particle collision dynamics and Brownian Dynamics are mesoscopic methods that naturally include fluctuations, this hybrid scheme presents a promising alternative to more traditional approaches, also because of the flexibility to model different geometries and modifying the constitutive model. The scheme was tested in several ways. Poiseuille flow was simulated for various model parameters and effective viscosities were determined from the resulting flow profiles. The effective, field-dependent viscosities are found to be in very good agreement with theoretical predictions. We also study Stokes' second flow problem for ferrofluids. For weak amplitudes and low frequencies of the oscillating plate, we find that the velocity profiles are well described by the result for Newtonian fluids at the corresponding, field-dependent viscosity. Furthermore, the time-dependent profiles of the nonequilibrum magnetization component are well approximated by their steady-state values in stationary shear, when evaluated with the instantaneous local shear rate. Finally, we also apply the new scheme to simulate ferrofluid shear flow over rough surface. We find characteristic differences in the nonequilibrium magnetization components when the external field is oriented in flow and in gradient direction.

show abstract

“…In recent years, related work in capillary wick plays a vital role, including the rise of groundwater in soil 13 , oil displacement by brine in the reservoir rock 14,15 , and water transport in plant tissue 16 . Scholars have also conducted a large amount of research to clarify the relationship between the transport performance of a capillary wick and its pore structure.…”

mentioning

confidence: 99%

Simulation examining the factors influencing capillary wick transport in a refrigerant direct cooling system for power battery packs

Hu,

Shan,

Zeng

et al. 2023

Sci Rep

View full text Add to dashboard Cite

The effectiveness of power battery refrigerant direct cooling systems of electric vehicles incorporating capillary wicks is directly determined by these wicks’ transport performance. The Fries–Dreyer equation describes wicking behavior, but there is a significant gap between its predictions and the experimental results as reported in the literature. This work examines the factors influencing transport performance in an unconsolidated capillary wick with spherical particles. A mathematical and physical model is developed, the latter using the COMSOL software platform. Both the developed mathematical form and the numerically simulated results of this model are closer to the experimental results than those obtained using the Fries–Dreyer equation. The simulation results enable optimizing the equilibrium height and capillary time numbers providing a fitted Fries–Dreyer equation that is then used to analyze the influence of saturation, inclination angle, wick particle diameter, and tortuosity on the liquid rise mass and velocity and the equilibrium height, and the effects are in close but not perfect accord with experimental data. To narrow the gap, the Fries–Dreyer equation is further optimized using the numerically simulated results, substantially improving the accord with the experimental results.

show abstract

Oil Displacement by the Magnetic Fluid Inside a Cylindrical Sand-Filled Sample: Experiments and Numerical Simulations

Cited by 5 publications

References 18 publications

Study on Effective Extraction Radius of Directional Long Borehole and Analysis of the Influence Mechanism

Study on Effective Extraction Radius of Directional Long Borehole and Analysis of the Influence Mechanism

Simulating the flow of interacting ferrofluids with multiparticle collision dynamics

Simulation examining the factors influencing capillary wick transport in a refrigerant direct cooling system for power battery packs

Contact Info

Product

Resources

About