3. Site and measurement set-up
In this chapter the site and instrumentation for the full-scale experiments
The objectives of the experiments are the following:
- development and testing of driving rain gauges.
Driving rain gauges are not commercially available
and no standard for their design does exist. Therefore several
types of driving rain gauges were designed, tested and compared
- acquisition of driving rain data simultaneously with
relevant weather data (in real
circumstances, in full scale) for the development of models for
driving rain and for studies on heat, air and
moisture transport in building envelopes.
- verification of CFD simulations of wind and driving rain for the
The Main Building of the TUE was found to be a practical choice for the
experiments, because of the following reasons:
- The Main Building is oriented north-south and has a large west façade.
The prevailing direction for wind and rain is between south and west.
Therefore the west façade is suited for driving rain
- There are no significant obstacles up to 400-500 m from the Main Building
in south-west to westward direction. The fetch
in this direction is rough and consists mainly of trees.
Moreover, the Main Building is
a large building (45 m high, 169 m wide, 20 m deep) and its height
is much larger than .
- A suitable location for reference measurements of wind
and rain from the mentioned directions was found at the
west side of the Main Building.
- Moreover, an ultrasonic anemometer on top of a mast placed west
from the Main Building has been operational for reference wind
measurements since April 1994.
It was part of the measurement set-up of [Geurts 1997] and
useful information on the wind characteristics on the site has been obtained.
- A meteorological station of the Royal Netherlands Meteorological
Institute (KNMI) is located at Eindhoven Airport
(approximately 7.5 km westwards to the TUE site). The data of this
station is useful for comparison with our data.
- During the measurements, the Building Physics group was situated at the two top floors of the
Main Building. This and the general fact that the measurements are done at
the university campus, facilitate the installation, accessibility
and maintenance of the instruments. Moreover, the façade elements
of the Main Building are easily removable, because the façade is a curtain
wall, consisting of glass windows in frames of steel columns.
The following sections deal with the site, instrumentation and data
processing. Details have already been reported in [van Mook 1998a]
and [van Mook 1998b]. [Högberg et al. 1999] describe the
full-scale comparison test of driving rain gauges at the west façade
of the Main Building. For this test, the Chalmers University of
Technology (CTH), the Technical University of Denmark (DTU) and TUE
compared driving rain gauges which they use.
© 2002 Fabien J.R. van Mook
Published as issue 69 in the Bouwstenen series of the Faculty of Architecture, Planning and Building of the Eindhoven University of Technology.