Eulerian-Lagrangian model for gas-evolving processes based on supersaturation

Heidi Van Parys, Steven Van Damme, Pedro MacIel, Thomas Nierhaus, Flora Tomasoni, Annick Hubin, Johan Deconinck

Onderzoeksoutput: ChapterResearchpeer review

8 Citaten (Scopus)

Samenvatting

Predicting the macro~scale behaviour of gas bubbles and understanding the coupling between bubbles and fluid flow is essential if one wants to describe the local concentration of all electrolyte components and the current density distribution at an electrode surface. The presented two-phase model uses an Eulerian-Lagrangian approach to simulate the hydrodynamic phenomena occurring in the bubble laden flow. The model describes the continuous electrolyte phase via the incompressible Navier-Stokes equations. while the trajectories of the gas bubbles are tracked sequentially in space and time. The electrochemical behaviour of the reactor is described using the Multi-Ion Transport and Reaction Model (MITReM). which considers for all relevant species the effect of convection. diffusion and migration and homogeneous reactions. For the electrode reactions, Butler-Vohner kinetics are used. The MITReM provides thc concentration of dissolved gas at the electrode and in the electrolyte. At predefined nuclei gas bubbles are formed proportional to the local supersatttration. After a certain time the spherical bubbles are large enough to become detached bubbles. While the bubbles are growing on the electrode surfiieei they block the surface and therefore also influence the current density distrihutiou. The first steps in view of the validation of`the proposed two-phase model against experiments are reported.
Originele taal-2English
TitelElectrochemical Process Simulation III
RedacteurenC. A. Brebbia, R. A. Adey
UitgeverijWIT Press
Pagina's109-118
Aantal pagina's10
ISBN van elektronische versie9781845643690
ISBN van geprinte versie978-1-84564-192-4
StatusPublished - 2009

Publicatie series

NaamWIT Transactions on Engineering Sciences
UitgeverijWIT Press
Volume65
ISSN van geprinte versie1743-3533

Bibliografische nota

C. A. Brebbia, R. A. Adey

Vingerafdruk

Duik in de onderzoeksthema's van 'Eulerian-Lagrangian model for gas-evolving processes based on supersaturation'. Samen vormen ze een unieke vingerafdruk.

Citeer dit