Large-Eddy Simulation #40: 6.4 x 6.4 km Homogeneous CBL
The purpose of this run was to simulate a relatively simple
(homogeneous) convective boundary layer and compare the results with
those in a paper by Nieuwstadt et al. (1993). The model is initialized
with a neutral sounding that has a little bit of random noise added to
it. It is driven by a constant homogeneous 0.06 K m/s sensible heat
flux from the surface and there is no moisture in the model. We intend
to compute profiles of turbulence statistics from this run for
comparison with other LESs and observations of this relatively standard
case. The grid used here is set to match the models described
in the Nieuwstadt et al. paper.
LES RUN #40: 160 m HORIZONTAL, 50 m VERTICAL RESOLUTION
Domain size 40x40x50 grid-points.
Click here to see the NMSTASK file.
This domain is 6.4 km (east-west) by 6.4 km (north-south) wide.
The horizontal slice of w shown above (200 m above the surface)
contains coherent polygonal spokes and cells that have been observed in
other LESs (for example, see Schmidt and Schumann, 1989, JFM, 511-562)
and our Volume Imaging Lidar data (10 Jan 98 14:16-14:57 Z and 13 Jan
98 16:25-16:30 Z).
UW Lidar // Feb 18, 1999 // root@lidar.ssec.wisc.edu
Return to the
Index
