Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9877644 | Physica D: Nonlinear Phenomena | 2005 | 11 Pages |
Abstract
Transport of oxygen from the gas phase into shallow layers of water and diluted sulfuric acid has been investigated. To this purpose, the temporal evolution of the oxygen concentration in the liquid layers was followed at fixed vertical positions by an oxygen-sensitive electrode. The vertical position of the electrode was varied in 0.1âmm steps. The oxygen concentration profiles were reconstructed from the measured data. As expected, the transport of oxygen into a water layer occurs by diffusion. In contrast, spontaneous interfacial turbulence was found to develop during the transport of oxygen into a shallow layer of sulfuric acid, causing a pronounced deviation from a diffusion profile in a 0.5âmm region underneath the gas/liquid interface. In this topmost layer, surface tension-driven (Marangoni) convection is the dominant transport mechanism, while the bulk liquid layer that extends from 0.5âmm below the interface to the bottom is hydrodynamically quiescent and transport by diffusion prevails.
Related Topics
Physical Sciences and Engineering
Mathematics
Applied Mathematics
Authors
Marcus J.B. Hauser, Jana Oberender, Sören Richter, Katrin Bartels, Stefan C. Müller,