Item: Aerodynamic and Surface Characteristic Length Scales of Snow Covered Flat Planes
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Title: Aerodynamic and Surface Characteristic Length Scales of Snow Covered Flat Planes
Proceedings: International Snow Science Workshop, Davos 2009, Proceedings
Authors:
- Christof Gromke [ WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland ]
- Michele Guala [ Graduate Aerospace Laboratories, California In stitute of Technology, Pasadena CA, U.S.A. ]
- Costantino Manes [ Dipartimento di Idraulica, Traspo rti ed Infrastrutture Civili, Polit ecnico di Torino, Torino, Italy ]
- Benjamin Walter [ WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland ]
- Michael Lehning [ WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland ]
Date: 2009
Abstract: Velocity profiles over fresh fallen snow surfaces have been measured in the SLF cold atmospheric boundary layer wind tunnel. Aerodynamic roughness lengths z0 have been estimated from log-law velocity profile fitting. In parallel, photographs of the snow surfaces have been taken and evaluated using digital image analysis giving snow surface contour line coordinates. Applying structure functions to the snow surface coordinates and statistical fitting analyses resulted in sets of surface characteristic length scales (random field approach). The synthesis of both approaches suggests a linear relationship between z0 and one of the surface characteristic length scales.
Language of Article: English
Presenters: Unknown
Keywords: aerodynamic roughness length, digital image analysis, snow surface roughness, structure functions, surface characteristic length scales, turbulent boundary layer flow
Page Number(s): 136-140
Subjects: aerodynamic snow covered flat planes surface characteristic
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Digital Abstract Not Available
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