Airflow Analystで取り扱う「風」について説明します。
This section describes the "winds" with which Airflow Analyst deals.
風向は、真北を基準に風上の方位角を時計回りの360度指定で表します。
(例: 北風=0.0, 東風=90.0, 南風=180.0, 西風=270.0)
Wind direction is determined by the direction from which it originates, with reference to true north, expressed by a clockwise 360-degree unit.
(Example: north wind=0.0, east wind=90.0, south wind=180.0, west wind=270.0)
風速成分をU, V, Wとします。
The wind components are U, V, W.
例えば、流入風向が西の場合、 Uの値は西から東へ、Vの値は南から北へ、Wの値は地表から上空へ向かってプラスになります。
For example, if the inflow direction is west, the value of U will be positive from west to east, V from south to north, and W from the ground to the sky.