Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L01: Nonlinear Dynamics: Coherent Structures II
4:05 PM–6:41 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B201
Chair: George Haller, ETH Zurich
Abstract ID: BAPS.2018.DFD.L01.1
Abstract: L01.00001 : What makes the boundary of uniform concentration zones ?
4:05 PM–4:18 PM
Presenter:
Willem van de Water
(Laboratory for Aero and Hydrodynamics, Delft University of Technology and J.M. Burgers Centre for Fluid Dynamics, 2628 CD Delft, The Netherlands)
Authors:
Willem van de Water
(Laboratory for Aero and Hydrodynamics, Delft University of Technology and J.M. Burgers Centre for Fluid Dynamics, 2628 CD Delft, The Netherlands)
Jerke Eisma
(Laboratory for Aero and Hydrodynamics, Delft University of Technology and J.M. Burgers Centre for Fluid Dynamics, 2628 CD Delft, The Netherlands)
Jerry Westerweel
(Laboratory for Aero and Hydrodynamics, Delft University of Technology and J.M. Burgers Centre for Fluid Dynamics, 2628 CD Delft, The Netherlands)
Daniel Seewai Tam
(Laboratory for Aero and Hydrodynamics, Delft University of Technology and J.M. Burgers Centre for Fluid Dynamics, 2628 CD Delft, The Netherlands)
Lagrangian coherent structures are attractive candidates for making the boundaries of these zones. They come in the shape of transient ridges that form barriers to turbulent mixing. However, their role appears to be tiny. The edges of uniform concentration zones correlate much stronger with regions of large shear.
Understanding the organization of scalar dispersion, and its relation with coherent events in the velocity field is of great relevance for understanding the spread of pollution inside the atmospheric turbulent boundary layer.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L01.1
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