InterPore2023

Session

MS19

23 May 2023, 12:00

477. TRANSPORT AND ENERGY CONVERSION IN NON-ISOTHERMAL BATTERY SYSTEMS. THE CASE OF THE LITHIUM BATTERY

Øystein Gullbrekken (Department of Materials Science and Engineering, Norwegian University of Science and Technology, NTNU, Trondheim)

23/05/2023, 12:00

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

Electrochemical cells like batteries are complex heterogeneous layered structures, and each layer is frequently porous. This brings out central questions like; how many and which interfaces play a role in energy conversion? And, how do we define and measure this role? In other words, how do we describe the interplay between the various fluxes of heat, mass and charge in each layer? Most often...

634. Electro-diffusion through montmorillonite gels

Dr Fatiha Bouchelaghem (Sorbonne Université)

23/05/2023, 12:15

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

Numerous experimental and theoretical studies, conducted from the atomic to the field scales, have demonstrated that macroscopic properties of smectite clays, such as ion diffusivity and swelling potential, are governed by the underlying hierarchical organization of pores, and by the morphology and permanent charge deficit of the montmorillonite layers that form its finest fraction....

744. Modeling quasi-steady-state phase change transport in polymer electrolyte membrane fuel cells: Effect of surface crack density

Dr Pablo Angel Garcia-Salaberri (Universidad Carlos III de Madrid)

23/05/2023, 12:30

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

Two-phase transport plays a major role to improve peak power density at low Pt loading in polymer electrolyte membrane fuel cells (PEMFCs). In this regard, optimization of thin porous media of the membrane electrode assembly (MEA) plays an important role to alleviate cathode flooding for enhanced oxygen diffusivity, while maintaining good membrane hydration for high ionic conductivity [1]. In...

803. Revealing multi-component 4-D heterogeneity in electrochemical systems via simultaneous neutron and X-ray tomography

Pranay Shrestha (University of Toronto)

23/05/2023, 12:45

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

Simultaneous neutron and X-ray tomography (NeXT) harnesses the benefits of both X-rays and neutrons to enable truly correlative and high-contrast imaging of a wide range of multi-material systems. NeXT is especially well-suited to study fluid flow and morphological characteristics in porous media, such as porous layers found in electrochemical devices. In this study, we utilize operando NeXT...

416. Reflection and Transmission Coefficients at the Interface of Fluid-Saturated Porous Media

Mr Fabien Borocin

23/05/2023, 14:15

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

We consider a classic problem of acoustic waves reflection at the interface between two visco-poroelastic saturated materials.

Decomposing the wavefield into downgoing and upgoing plane waves, we write down explicitely the polarisations for all waves (P-, Biot-, Sv- et Sh-waves). In analogy with the elastic case, the reflection-transmission-conversion (RTC) coefficients can then be obtained...

525. AN EFFICIENT TIME DOMAIN IMAGE-BASED FINITE ELEMENT IMPLEMENTATION TO SIMULATE WAVE PROPAGATION IN POROUS MEDIA

Victor Wriedt Sapucaia

23/05/2023, 14:30

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

In this work, we present an efficient 2D/3D Finite Element implementation to simulate the propagation of elastic waves, in the time domain, in porous media. The input data for our solution are binary images, of which each voxel can be solid or pore. We consider regular structured meshes composed of cubic elements, compatible with the image-based approach. Our implementation takes advantage of...

651. A domain decomposition strategy to compute effective electrical conductivity of large-scale 3-D digital rock images.

Mr Rafael da Silva Vianna (Institute of Computing, Fluminense Federal University)

23/05/2023, 14:45

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

Electrical properties play an important role in the study of rock media. Estimating effective electrical properties of materials by means of laboratory testing is usually time-consuming and does not provide a complete understanding of the material microstructure. On the other hand, it is well known that numerical homogenization in conjunction with micro-computed tomographic images allows an...

734. Young’s modulus evolution during sintering of ceramics with and without shrinkage

Willi Pabst (University of Chemistry and Technology, Prague)

23/05/2023, 15:00

(MS19) Elastic, electrical, and electrochemical processes and properties in porous media

Oral Presentation

Sintering of ceramics consists in the formation of bulk materials from disperse partcicle systems (unconsolidated powder compacts). It always involves strengthening (i.e. due to the formation and growth of sinter necks between the particles or grains) and usually (but not always) also densification (i,e. the reduction of possibly complete elimination of pores) and coarsening (grain growth)....