Environmental Engineering Reference
In-Depth Information
Since the primary interest in this work is testing the applicability of our modified
version of RAMS6 (RAMS6-mod hereafter) in real conditions, we focus on the
MUST field experiment. From all the available cases we chose case n. 2681829,
and considered the observations fields averaged over a reference period 300-500 s
after the start of the observational period, as suggested in experiment's documen-
tation (Yee and Biltoft, 2004). In the following, the flow, turbulence and concen-
tration fields and profiles computed by RAMS6-mod are compared to observations
collected in the above case.
The Mock Urban Setting Test - MUST data set provides flow and dispersion
data measured within an idealized urban roughness, composed by an array of 120
containers (12.2 m long, 2.42 m wide, 2.54 m high), during an extensive field test
carried out on a test site in the Great Basin Desert in 2001 (for details see Yee and
Biltoft, 2004). The terrain of the field site is characterized as 'flat open terrain'
with an horizontally homogenous roughness, 0.5-1 m high. Other orographical
structures, present in the field, were assumed to have no significant effect on the
approach flow conditions at the test site.
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Samplers
Fig. 1.
Geometry of MUST experiment (c.o. B. Leitl), showing the direction of the incoming
flow (arrow), the T tower location, the 119 containers and the service van. Note the labeling of
the obstacles rows where samplers were placed
RAMS6-mod simulation domain extends 265 m in the longitudinal with a grid
size of 0.8 and 321 m in the latitudinal direction with a grid size of 1.6 m. In the
vertical there are 35 stretched levels with a resolution of 0.2 m up to 3.3 m, with a
total height of 36 m. The size and locations of the 120 containers followed the data
information provided for the MUST case. The mean wind profile for the inflow
