Roza,
The pressure coefficients don't vary with wind speed but they do vary with wind direction. You should make sure you have reasonable values for each direction for which there is significant wind. See the description of
AirflowNetwork:MultiZone:ExternalNode,
AirflowNetwork:Multizone:WindPressureCoefficientArray and
AirflowNetwork:MultiZone:WindPressureCoefficientValues
in the Input Output Reference manual
You need at least one ExternalNode object and WindPressureCoefficientValues object for each facade that has openings. The pressure coefficients vary across the facade so you may want to have several ExternalNode objects on each facade. You can start with one per facade and add more as your design develops.
For further information, consult the AirflowNetwork Model section of the Engineering Reference manual.
Phil
On 5/5/2012 7:31 AM, roza wrote:
Dear all,
I want to get the pressure coefficient values by CFD simulation and put them as an input for e+ simulation.
As I know, the pressure coefficient values are changing with wind speed. so I wonder which speed should I use for wind in CFD simulation to get the pressure coefficient values?
Is it necessary to put these values in e+ simulations for all building facades?
Is it enough to put these values in e+ just for 2 wind directions?
-- ______________________________________________________________________ Philip Haves Leader, Simulation Research Group Lawrence Berkeley National Laboratory One Cyclotron Road, MS 90R3111 Berkeley, CA 94720-8134 (510) 486 6512 (office) (510) 486 4089 (fax)
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