The occurrence of heterogeneous flow structures in gas-particle flows seriously affects the gas-solid contacting and transport processes in high-velocity gas-fluidized beds. Particles do not disperse uniformly in the flow but pass through the bed in a swarm of clusters. The so-called “core-annulus” structure in the radial direction and “S” shaped axial distribution of solids concentration chara...

Implementing the use of solid electroactive materials in redox-flow battery (RFB) configuration is an appealing challenge since resulting technologies benefit from high energy density and independent scalability power RFB configuration. In recent years, two different strategies have emerged to achieve this goal: i) semi-solid flow batteries ii) redox-mediated batteries, also referred as redox t...

A volume-penalizing immersed boundary (IB) method is presented that facilitates the computation of fluid flow in complex porous media. The computational domain is composed of a uniform Cartesian grid, and solid bodies are approximated on this grid using a series of grid cells (i.e., a “staircase” approximation). Solid bodies are distinguished from fluid regions using a binary phase-indicator fu...