Wind Effects on Flow Patterns and Net Fluxes in Density-Driven High-Latitude Channel Flow: WIND EFFECTS ON CHANNEL FLOW
Authors:
;
Publication Date:
NSF-PAR ID:
10049652
Journal Name:
Journal of Geophysical Research: Oceans
Volume:
123
Issue:
1
Page Range or eLocation-ID:
305 to 323
ISSN:
2169-9275
Publisher:
DOI PREFIX: 10.1029
1. Direct numerical simulations are performed for incompressible, turbulent channel flow over a smooth wall and different sinusoidal wall roughness configurations at a constant $Re_\tau = 720$ . Sinusoidal walls are used to study the effects of well-defined geometric features of roughness-amplitude, $a$ , and wavelength, $\lambda$ , on the flow. The flow in the near-wall region is strongly influenced by both $a$ and $\lambda$ . Establishing appropriate scaling laws will aid in understanding the effects of roughness and identifying the relevant physical mechanisms. Using inner variables and the roughness function to scale the flow quantities provides support for Townsend's hypothesis,more »