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At
BRE, computational fluid dynamics (CFD) is used routinely to study
a diverse range of applications. These include predictions for indoor
airflow within buildings, tunnels, aircraft etc, and the transport
of smoke and heat in the event of fire.
We have significant expertise in fire safety engineering applications,
and have developed our own programme: JASMINE.
CFD is also used as a complimentary tool to the wind tunnel for ventilation
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The accuracy of the numerical
(CFD) solution depends not only on the resolution of the spatial and
temporal discretisation schemes, but also on the treatment of various
physical phenomena that can be represented only approximately in the
mathematical model. Of these, the treatment of turbulence is often
the most important in respect of the accuracy of the predictions.
This applies particularly in wind engineering where the wide ranges
of turbulent length and time scales, and the importance of gust conditions,
means that great care has to be taken in the application of CFD and
the interpretation of the results.
There are still important issues in terms of the accuracy of CFD compared
to wind tunnel measurements. BRE is currently studying the relative
merits and accuracy of the wind tunnel and CFD (RANS) approaches to
wind engineering, and the findings will be published later this year.
For further information, please call BRE Environment on 01923 664500.
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