Predictions of effective physical properties of complex multiphase materials

Wang, Moran; Pan, Ning

doi:10.1016/j.mser.2008.07.001

Cited by 626 publications

(323 citation statements)

References 262 publications

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“…I, in developing LB models for the CDE, many previous investigators focused on the accuracy and convergence rate of the model in describing the scalar variable φ [12][13][14][15][16][17][18][19][20][21]. More recently, the heat or mass flux, as another important physical variable, has also received increasing attention in predicting effective physical properties of porous media [33]. However, to our knowledge, there is no a special discussion on this topic in the framework of LBM.…”

Section: A Local Scheme For the Heat And Mass Fluxesmentioning

confidence: 99%

Lattice Boltzmann model for the convection-diffusion equation

2013

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We propose a lattice Boltzmann (LB) model for the convection-diffusion equation (CDE) and show that the CDE can be recovered correctly from the model by the Chapman-Enskog analysis. The most striking feature of the present LB model is that it enables the collision process to be implemented locally, making it possible to retain the advantage of the lattice Boltzmann method in the study of the heat and mass transfer in complex geometries. A local scheme for computing the heat and mass fluxes is then proposed to replace conventional nonlocal finite-difference schemes. We further validate the present model and the local scheme for computing the flux against analytical solutions to several classical problems, and we show that both the model for the CDE and the computational scheme for the flux have a second-order convergence rate in space. It is also demonstrated the present model is more accurate than existing LB models for the CDE.

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Section: A Local Scheme For the Heat And Mass Fluxesmentioning

confidence: 99%

Lattice Boltzmann model for the convection-diffusion equation

2013

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“…ation-growth (RGG) method to reproduce the random and multiphase microstructures using given statistical information from images and using the lattice Boltzmann method (Chen and Doolen, 1998;Raabe, 2004) to calculate the transport properties on the RGG model, which agree well with the properties of porous media (Wang and Pan, 2008). The RGG model has another advantage that it can be adjusted to some structural properties, such as porosity, anisotropy, heterogeneity.…”

Section: Imaging and Construction Of Porous Mediamentioning

confidence: 85%

Applications of digital core analysis and hydraulic flow units in petrophysical characterization

Chen

Zhou

2017

Adv. Geo-Energ. Res.

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Conventional petrophysical characterizations are often based on direct laboratory measurements. Although they provide accurate results, such measurements are time-consuming and limited by instrument and environment. What's more, in the georesource energy industry, availability and cuttings of core plugs are difficult. Because of these reasons, virtual digital core technology is of increasing interest due to its capability of characterizing rock samples without physical cores and experiments. Virtual digital core technology, also known as digital rock physics, is used to discover, understand and model relationships between material, fluid composition, rock microstructure and macro equivalent physical properties. Based on actual geological conditions, modern mathematical methods and imaging technology, the digital model of the core or porous media is created to carry out physical field numerical simulation. In this review, the methods for constructing digital porous media are introduced first, then the characterization of thin rock cross section and the capillary pressure curve using scanning electron microscope image under mixed wetting are presented. Finally, we summarize the hydraulic flow unit methods in petrophysical classification.Keywords: Digital core, porous media, petrophysical characterization, thin section, mercury injection capillary pressure.Citation: Chen, X., Zhou, Y. Applications of digital core analysis and hydraulic flow units in petrophysical characterization. Adv.

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“…Moran Wang investigated the effective conductivity of high porosity porous foam using the lattice boltzmann method considering the radiation effect [19], and the effective physical properties of complex multiphase materials were also studied [20]. K. Vafai1 and S. J. Kim developed a theoretical model for heat transfer in a porous medium and found the thickness of the momentum boundary layer depends on both the Darcy number and the inertia parameter for a high permeability [21].…”

Section: Introductionmentioning

confidence: 99%

Numerical heat transfer analysis of transcritical hydrocarbon fuel flow in a tube partially filled with porous media

et al. 2016

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Hydrocarbon fuel has been widely used in airbreathing scramjets and liquid rocket engines as coolant and propellant. However, possible heat transfer deterioration and threats from local high heat flux area in scramjet make heat transfer enhancement essential. In this work, 2-D steady numerical simulation was carried out to study different schemes of heat transfer enhancement based on a partially filled porous media in a tube. Both boundary and central layouts were analyzed and effects of gradient porous media were also compared. The results show that heat transfer in the transcritical area is enhanced at least 3 times with the current configuration compared to the clear tube. Besides, the proper use of gradient porous media also enhances the heat transfer compared to homogenous porous media, which could help to avoid possible overtemperature in the thermal protection.

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Predictions of effective physical properties of complex multiphase materials

Cited by 626 publications

References 262 publications

Lattice Boltzmann model for the convection-diffusion equation

Lattice Boltzmann model for the convection-diffusion equation

Applications of digital core analysis and hydraulic flow units in petrophysical characterization

Numerical heat transfer analysis of transcritical hydrocarbon fuel flow in a tube partially filled with porous media

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