Dynamic behavior investigation of capillary rising at various dominant forces using free energy lattice Boltzmann method

Moradi, Bijan; Ghasemi, Shahab; Moghadam, Amir Hosseini; Rasaei, Mohammad Reza; Sajjadi, Mozhdeh

doi:10.1007/s11012-021-01426-z

Cited by 11 publications

(2 citation statements)

References 39 publications

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“…Traditional seepage analysis methods, relying on simplistic assumptions, are inadequate for analytical or semi-analytical flow modeling, particularly for scenarios characterized by significant microscale effects and intricate channel networks. These conventional methods struggle to accurately depict the fluid flow patterns in cross-scale rock masses transitioning from "microscopic pores" to "mesoscopic fractures" [23][24][25]. Thus, this course exists the problem of "Knowledge Obsolescence".…”

Section: Methodology 21 Present Situation Of the Rock Mass Seepage Me...mentioning

confidence: 99%

Application of Lattice Boltzmann Approach for Teaching a Rock Mass Seepage Mechanics Course

Miao,

Li,

et al. 2024

Atmosphere

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The technology of CO2 geological storage and CH4 intensive mining (CO2-ECBM) in coal seams integrates greenhouse gas emission reduction and new fossil energy development and has great development prospects. The CO2 injection, CO2 sequestration mechanism and storage capacity, and CH4 stimulation effect constitute the core content of the effectiveness of CO2-ECBM, among which CO2 injection is the most critical. Traditional seepage analysis methods often struggle to tackle flow-related issues influenced by microscale effects and intricate channels. This paper highlights the advantages of employing lattice Boltzmann (LBM) numerical simulations to study CO2 seepage behaviors when teaching a Rock Mass Seepage Mechanics Course. This course primarily covers topics such as the pore structure of rock, unstable liquid seepage, gas seepage theory and related subjects. Its goal is to provide students with a solid theoretical foundation to address the complexities of fluid seepage in pours media encountered in practical scenarios. A novel LBM-based methodology was employed to estimate the CO2 seepage capacity by incorporating the effects of different concentrations of [Bmin]Cl solution (0 wt%, 1 wt%, 3 wt%, and 5 wt%). The CO2 velocity distribution cloud map of each coal sample was simulated; the average velocity distribution curve of each coal sample was obtained; and the velocity profile of the seepage channel of each coal sample was described. This study can provide theoretical guidance for the technology of CO2 geological storage and CH4 intensive mining in coal seams.

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Section: Methodology 21 Present Situation Of the Rock Mass Seepage Me...mentioning

confidence: 99%

Application of Lattice Boltzmann Approach for Teaching a Rock Mass Seepage Mechanics Course

Miao,

Li,

et al. 2024

Atmosphere

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“…Observations show that the present model has been able to record the morphological characteristics of emulsion droplets. Also, the dynamic behavior of capillary ascent has been carefully studied using the free energy model (Moradi et al., 2021). The results provide interesting insights into the dynamics of capillary rising at early times.…”

Section: Introductionmentioning

confidence: 99%

Co‐Current Fluid Flow Mechanisms Within a Complex Porous Structure at the Pore Level

Moradi

Zojaji

2022

Water Resources Research

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This study has been addressed the mechanisms of the co‐current fluid flow in a heterogeneous porous media using the lattice Boltzmann method. Since the smallest interaction between viscous and capillary forces at the interface is of great importance, the simulations are performed with the hybrid phase‐field model at the pore level. This is because the main advantage of this model is that due to its connection with the phase‐field theory, it has a solid physical basis to record interface dynamics. Model verification is followed by recording viscous coupling effects. The relative permeability curves and the velocity profiles are compared with the analytical solution, so that the observations confirm the accuracy claim of the model. In the following, the fluid flow through the heterogeneous porous structure is simulated, so that its sweep efficiency and corresponding velocity field at the breakthrough time are discussed. The results show that increasing the injection velocity reduces the displacement efficiency and increases the velocity field fluctuations due to the viscous fingering regime. Changing the wetting conditions to strong imbibition (SI) will increase the efficiency due to the role of capillary pressure and corner flow mechanism. Also, increasing the interfacial tension in the SI and the strong drainage will increase and decrease the sweep efficiency, respectively, so the rate of changes in fully immiscible flow is much higher than the near miscible flow. The velocity fluctuations in the fully immiscible flow are more significant than in the near miscible flow, which is reasonable given the flow properties.

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Introducing a novel method for determining the effective thermal conductivity at moderate and high Péclet numbers

Ghasemi,

Arocha,

Fayazi

et al. 2024

Can J Chem Eng

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Flow and heat transfer in porous materials is a common topic throughout many fields, including environmental and petroleum engineering. Using a coupled approach of experimental and simulation methods, this study presents a novel method for calculating thermal conductivity. Specifically, a new approach for the measurement of thermal dispersivity with both conduction and forced convection drives is proposed. In our experiments, temperature was monitored at different points within the porous medium, providing detailed spatial temperature distributions. These measurements allowed us to calculate and report effective thermal conductivity, enhancing the accuracy of our model. Experiments with various injection rates and temperatures were conducted on a sand pack. There is a relationship between the composition and connectivity of the solid in the geometry and heat transfer. However, in the case of forced convection, the key factor is the Péclet number which is important for optimal extraction of the heat inside the geothermal reservoir according to the cooling rate. When the Péclet number is high, the permeability of the porous medium plays a significant role. The velocity of the fluid can change the effective thermal conductivity up to four orders of magnitude. Due to the thermal resistance of solid and fluid, the temperature gradient between the boundary and the centre of the geometry was seen and temperature peaks were observed in the initial stages of the experiments. The size and number of peaks at the initial stage of the experiments are highly dependent on the matrix properties, such as thermal conductivity and surface area.

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Dynamic behavior investigation of capillary rising at various dominant forces using free energy lattice Boltzmann method

Cited by 11 publications

References 39 publications

Application of Lattice Boltzmann Approach for Teaching a Rock Mass Seepage Mechanics Course

Application of Lattice Boltzmann Approach for Teaching a Rock Mass Seepage Mechanics Course

Co‐Current Fluid Flow Mechanisms Within a Complex Porous Structure at the Pore Level

Introducing a novel method for determining the effective thermal conductivity at moderate and high Péclet numbers

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