A Wind Tunnel Full-Scale Building
Model Comparison between Experimental and CFD Results Based on the Standard k-e
Turbulence Representation
Shigeki Nishizawa1,
Takao Sawachi1, Ken-ichi Narita2, Hironao Seto1
and Yumi Ishikawa1
1 Building Research Institute, Japan, 2Nippon Institute of
Technology, Japan
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Abstract
To evaluate the property of
cross ventilation quantitatively, it is important that the calculated air flow
field is compared with measurement. In this paper, the air flow field in the
wind tunnel of the Building Research Institute of Japan (BRI) was calculated by
CFD analysis using the standard k-e
model, and the adequacy of the calculation was examined by comparison with
measured values. Results showed that:
·
The calculated air flow field was generally in good agreement with
the measured field;
·
The distribution of the wind pressure coefficient was similar
between measurement and calculation;
·
The calculated value of wind pressure coefficient was lower than
measurement;
·
The turbulent kinetic energy was not significantly overestimated;
·
The differential pressure between openings showed a good relation
to measurement;
·
The calculated indoor air flow, inside a simple building model
enclosed in the wind tunnel, was strongly influenced by external conditions.
Key words:
Cross ventilation, wind tunnel experiment, standard k-e
model, CFD.
