Pore scale
Pore scale 3D modelling of heat and mass transfer in the gas diffusion layer and cathode channel of a PEM fuel cell
... the pore scale structure combined with a computational fl uid dynamics (CFD) solution of a represen- tative portion of the macro scale geometry can be used to realisti- cally simulate macroscopically ...
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Pore-scale Analysis of Residual Oil in Sandstones and its Dependence on Waterflood Salinity, Analysed by Tomography and Microscopy
... compute pore and fluid volumes, interfacial areas and curvatures, and other metrics ...this pore- scale investigation of LSW can be extended towards nanometer scales using ultra-high resolution ...
174
Pore scale numerical investigation of pressure drop behaviour across open cell metal foams
... grid-based pore-scale numerical modelling methodology applied to five different commercial metal foam samples is ...and pore size distribution are directly calculated from tomographic ...Airflow ...
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Investigation of pore-scale random porous media using lattice boltzmann method
... Treating the flow through porous medium by the method of the conventional Navier–Stokes codes is often faced with extensive computational time, poor convergence and/or numerical instability that stem from the narrowness ...
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Silver Nanoparticle Transport Through Soil: Illuminating the Governing Pore-Scale Processes
... be widely applied to nanoparticle transport. XCMT imaging has been performed for micron-sized colloids as they can be easily observed due to their relatively high density and large particle diameter which can be larger ...
276
Numerical Simulations of Turbulence in Porous Media – A Study on the Vortex Structure and Vortex Interactions at the Pore Scale.
... considered. The periodic arrangement of obstacles is perceived differently by the flow in the case of low porosity. Rather than looking at the arrangement in terms of the obstacles, one must think of the GPM for low ...
118
On the predictivity of pore scale simulations : estimating uncertainties with multilevel Monte Carlo
... The method has been tested for the analysis of the variabilities in averaged geometric properties and effective permeability and diffusivity with finite sample size but it is appli- cable to a wide range of problems, as ...
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Three Dimensional Imaging of Pore Scale Water Flooding Phenomena in Water Wet and Oil Wet Porous Media
... any pore throat connected to that pore space acted in the same way, so the water from all of the throats pushed the oil toward the center of the pore space, implying that the oil could not go ...
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Effect of wettability on two phase quasi static displacement: validation of two pore scale modeling approaches
... Figure 3: Interfaces at the critical value of curvature for the pore throat with rhomboid angle 45◦ for two extreme cases of contact angle, showing comparison between level set top - NW [r] ...
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Pore-scale permeability prediction for Newtonian and non-Newtonian fluids
... using modern techniques including X-ray computed tomog- raphy (CT) and nuclear magnetic resonance imaging (NMR) (Dvorkin et al., 2011; Arns et al., 2001; Arns, 2004). In a first step, the obtained microstructural images ...
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Numerical Experiments of Pore Scale for Electrical Properties of Saturated Digital Rock
... In the past decades, the nonlinear relation of I-Sw in log-log coordinates, called non-Archie phenomenon, has been increasingly observed from the experiments [3,8, 18-20]. Many researches have been done to explain the ...
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Modelling and upscaling of transport in carbonates during dissolution: validation and calibration with NMR experiments
... At the heart of PTM-CTRW is the correct choice of transit-time dis- tribution ψ(t). In their pore-scale simulation, Rhodes et al. (2008) em- ployed two types of transit-time distribution, one derived from ...
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Experimental study of forced convection heat transport in porous media
... at pore scale with a channeling effect which causes (1) the increase in the macrodispersion phenomena in the forced convection heat transport, (2) the decrease in the surface of the grain avail- able to ...
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Modelling and upscaling of transport in carbonates during dissolution: validation and calibration with NMR experiments
... shape of the propagators is predicted at later observation times. Finally, a numerical upscaling technique is employed to obtain CTRW parameters for the core. From the NMR-measured propagators, an increasing frequency of ...
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Typology, morphology and connectivity of pore space in claystones from reference site for research using BIB, FIB and cryo-SEM methods
... accurate pore models of ...at pore scale opening a new field of investigations to study relation between nanostructures and macro-properties which are poorly understood at ...of pore space ...
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A numerical simulation of single and two-phase flow in porous media: A pore sale observation of effective microscopic forces
... A number of approaches has been suggested in the literature in order to reconstruct 3D porous media from 2D thin section images. Early efforts are known as statistical models and are based on matching the statistical ...
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Impact of anisotropy level of gas diffusion layer on the temperature distribution of a PEM fuel cell cathode electrode
... three-dimensional pore-scale model based on the lattice Boltzmann method for a PEM fuel cell cathode electrode is presented, taking into account the electrochemical reaction in the catalyst layer and the ...
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Mechanisms of dispersion in a porous medium
... time scale over a ...enough pore-lengths such that macroscopic medium properties as porosity and permeability, for example, can be uniquely ...REV scale can be represented in terms of the average ...
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Investigation of rainfall-induced shallow landslides on the northeastern rim of Aso caldera, Japan, in July 2012
... Results: The thickness of the soil layer was determined using portable dynamic cone penetration tests. The soils became thinner (about 1 m) from the upper to the lower slope. In-situ infiltration tests indicate that ...
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Understanding NMR relaxometry of partially water saturated rocks
... to pore shape and capillary ...triangular pore geome- tries during drainage and ...of pore size distribution and pore shape of triangular capillaries on the NMR response, in particular ...
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