Affiliation:
1. Norwegian University of Science and Technology
Abstract
Seventy percent of the Earth is covered by an air-water interface dependent on the flow on either side of it. This same interface is responsible for the largest carbon sequestration process on the planet. In this talk, we will explore the studies that have led us towards the on-going “GLITR” project focused on how turbulence on either side of a gas-liquid (air-water) interface manipulates the interface itself and gas transfer across it. The story begins with the influence of external turbulence on the flow over a rigid wall, before progressing into the mutual interactions of waves and sub-surface turbulence, and ending with preliminary bulk gas transfer measurements where it is demonstrated that the sub-surface turbulence intensity can significantly influence the transfer rate of sparingly soluble gases, specifically O_2, even though the bulk Reynolds number is held constant. These investigations are performed experimentally in a laboratory setting using active turbulence grids to manipulate the incoming turbulent flows.
Funder
European Research Council
Norges Forskningsråd