Fuuhi (English spelling) air elutriation

Japanese: 風簸 - ふうひ(英語表記)air elutriation
Fuuhi (English spelling) air elutriation
Also known as air classification, this is a method of separating particles using air currents. Because solid particles have different settling speeds in the air depending on their size, it is possible to separate a diverse group of particles into groups based on particle size in the air current. There are various types of devices, including vertical upward flow types that use gravity, horizontal flow types, straight flow types that use inertia, curved flow types, and cyclone types. (→Winnowing machine)

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
空気分級ともいい,気流を利用して粒子をふるい分ける方法。固体粒子は,その粒子の大きさによって空気中での沈降速度が違うので,雑多な粒子群を気流の中で粒度によるグループ別に分級することができる。種々の装置があり,重力利用による垂直上昇流型,水平流型,慣性利用の直線流型,曲線流型のほか,サイクロン型などがある。 (→唐箕〈とうみ〉)

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