RT Journal Article
T1 Dissolution of a CO2 spherical cap bubble adhered to a flat surface in air-saturated water
A1 Peñas López, Pablo
A1 Parrales Borrero, Miguel Ángel
A1 Rodríguez Rodríguez, Francisco Javier
AB Bubbles adhered to partially hydrophobic flat surfaces often attain a spherical cap shape with a contact angle much greater than zero. We address the fundamental problem of the diffusion-driven dissolution of a sessile spherical cap bubble (SCB) adhered to a flat smooth surface. In particular, we perform experiments on the dissolution of CO2 bubbles (with initial radii similar to 1 mm) immersed in air-saturated water adhered to two substrates with different levels of hydrophobicity. It is found that the contact angle dynamics plays an important role in the bubble dissolution rate. A dissolution model for a multicomponent SCB in an isothermal and uniform pressure environment is then devised. The model is based on the quasi-stationary approximation. It includes the effect of the contact angle dynamics, whose behaviour is predicted by means of a simplified model based on the results obtained from adhesion hysteresis. The presence of an impermeable substrate hinders the overall rate of mass transfer. Two approaches are considered in its determination: (a) the inclusion of a diffusion boundary layer-plate interaction model and (b) a finite-difference solution. The model solutions are compared with the experimental results, yielding fairly good agreement.
PB Cambridge University Press
SN 0022-1120
YR 2015
FD 2015-07-25
LK http://hdl.handle.net/10016/26898
UL http://hdl.handle.net/10016/26898
LA eng
NO The authors gratefully acknowledge the support of Total E&P Recherche etDéveloppement through study agreement FR00006995, and the Spanish Ministryof Economy and Competitiveness through grant DPI2014-59292-C3-1-P.
DS e-Archivo
RD 27 abr. 2024