Dynamics of Bubbles in Porous Media with Large Liquid-Gas Density Ratio
Abstract
The movement of bubbles in porous media is important for many situations, such as chemical agents absorbed in porous soil, energy exploitation, heterogeneous catalysis, and so on. In the work, the rising dynamics behavior in complex porous media with large liquid-gas density ratio is studied numerically by using the lattice Boltzmann model. The effects of porosity, wettabilities of the porous media surface, the Reynolds number, as well as the Eotvos on the interface dynamic behavior, including bubble deformation, breakup and coalescence mechanism, as well as the residual mass of the bubbles in the porous media are studied systematically. It is found that lower porosity leads to larger interactions at the fluid-solid interface and causes stronger capillary force acting on the bubbles. The high hydropholic substrates tend to facilitate bubble migration from porous media. As a result, the bubble residual mass decreases in these cases. Increasing both Reynolds and Eotvos numbers enhances bubble deformation and breakup and results in more bubble residual. Furthermore, an increased bubble initial distance causes a later coalescence of the bubbles. This work sheds some light on the mechanism of bubbles through the porous media with large liquid-gas density ratio.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMMR11C0055L
- Keywords:
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- 1805 Computational hydrology;
- HYDROLOGY;
- 1822 Geomechanics;
- HYDROLOGY;
- 1858 Rocks: chemical properties;
- HYDROLOGY;
- 1859 Rocks: physical properties;
- HYDROLOGY