noun
superficial velocity; superficial flow velocity
Engineering term for the volumetric flow rate divided by the total cross-sectional area of a packed bed or column, ignoring the packing material.
空塔速度は充填層の設計で重要なパラメータです。
Superficial velocity is an important parameter in packed bed design.
Compound of 空塔 (empty tower/column) and 速度 (velocity), referring to the velocity as if the tower were empty.