A holistic microclimate model

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apps:biomet_utci [2015/04/01 00:04] – enviadminapps:biomet_utci [2015/12/22 22:25] – enviadmin
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-As UTCI refers to the 10 m level, ENVI-met BioMet rescales the outputs  for the **required** level (pedestrian level) using the 10 m level data using the logarithmic wind power profile  +As the UTCI calculation expects the wind given at the 10 m level, ENVI-met BioMet uses the calculated local wind speed in the model domain related to the pedestrian level (zlevel) and scales it up to the  10 m level equivalent using the logarithmic wind power profile  
-$$v_{10m} := ln(10 / z0) / ln(zlevel / z0) * wind10m$$+$$Wind_{10m} := ln(10 / z0) / ln(zlevel / z0) * Wind_(zlevel)$$ 
 + 
 +In other word, if you calculate UTCI at some point for zlevel= 1.6 m, all ENVI-met data such as air temperature or radiative temperature will be used from this level, except of the wind speed which will be extrapolated to the 10 m level value.
  
 Obviously, that doesn't make much sense as the $z0$ roughness value is unkown for most sites, but ENVI-met provides detailed and calculated wind flow data for all levels.  Obviously, that doesn't make much sense as the $z0$ roughness value is unkown for most sites, but ENVI-met provides detailed and calculated wind flow data for all levels.