Skip to main content
Article
Modification of Turbulence at the Air-Sea Interface Due to the Presence of Surfactants and Implications for Gas Exchange. Part II: Numerical Simulations
Oceanography Faculty Books and Book Chapters
  • Silvia Matt, Nova Southeastern University
  • Atsushi Fujimara, Nova Southeastern University
  • Alexander Soloviev, Nova Southeastern University; University of Miami
  • Shin Hyung Rhee, Seoul National University
Book Title
Gas Transfer at Water Surfaces 2010
Document Type
Book Chapter
Editors
S. Komori, W. McGillis, R. Kurose
Description
We conducted high-resolution non-hydrostatic numerical simulations to study the effect of surfactants on near-surface turbulence. Laboratory experiments at the UM RSMAS ASIST facility presented in a companion paper report a reduction of turbulence below the air-sea interface and an increase of the surface drift velocity in the presence of surfactants. We implement the effect of surfactants as a rheological, viscoelastic boundary condition at the surface. Our numerical experiments are consistent with the results of the laboratory experiments. We also simulated the effect of surfactants on the temperature difference across the thermal molecular sublayer (cool skin) and on gas transfer velocity. The numerical simulations demonstrate an increase in the temperature difference across the cool skin and reduction of the gas transfer velocity in the presence of surfactant. The results also reveal the effect of surfactants on the different types of molecular sublayers (viscous, thermal and diffusion), which is important for the development of proper parameterization of the interfacial component of air-sea gas exchange under low and moderate wind speed conditions.
Publication Date
1-1-2011
Publisher
Kyoto University Press
Keywords
  • Numerical Simulation,
  • LES,
  • DES,
  • CFD,
  • Viscoelastic Boundary Condition,
  • Rheology
ORCID ID
0000-0001-6519-1547
Citation Information
Silvia Matt, Atsushi Fujimara, Alexander Soloviev and Shin Hyung Rhee. "Modification of Turbulence at the Air-Sea Interface Due to the Presence of Surfactants and Implications for Gas Exchange. Part II: Numerical Simulations" (2011)
Available at: http://works.bepress.com/alexander-soloviev/38/