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| apps:biomet_utci [2015/12/22 22:26] – enviadmin | apps:biomet_utci [2015/12/22 22:27] – enviadmin | ||
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| 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 | 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 | ||
| - | $$Wind_{10m} := ln(10 / z0) / ln(zlevel / z0) * Wind_{zlevel}$$ | + | $$ Wind_{10m} := \frac{ln(10 / z0)}{ln(zlevel / z0)} \cdot Wind_{zlevel}$$ |
| 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. | 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. | ||