651 research outputs found
Local log-law of the wall: numerical evidences and reasons
Numerical studies performed with a primitive equation model on
two-dimensional sinusoidal hills show that the local velocity profiles behave
logarithmically to a very good approximation, from a distance from the surface
of the order of the maximum hill height almost up to the top of the boundary
layer. This behavior is well known for flows above homogeneous and flat
topographies (``law-of-the-wall'') and, more recently, investigated with
respect to the large-scale (``asymptotic'') averaged flows above complex
topography. Furthermore, this new-found local generalized law-of-the-wall
involves effective parameters showing a smooth dependence on the position along
the underlying topography. This dependence is similar to the topography itself,
while this property does not absolutely hold for the underlying flow, nearest
to the hill surface.Comment: 9 pages, Latex, 2 figure
Description and parameterization of turbulence in the marine atmospheric boundary layer (VERITAS TUFFO)
Detection of mixing-layer heights from ground-based remote sensing with SODAR, ceilometers, and RASS - algorithms and experiences
On the determination of atmospheric boundary layer structures by ground-based remote sensing (SODAR, lidar/ceilometer, RASS)
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