noun
vortex device
Technical term for a device that utilizes a vortex flow, likely in fluidics or related engineering fields.
この渦流形素子は流体の制御に使われる。
This vortex device is used for fluid control.
Compound of 渦流 (かりゅう, 'vortex flow') + 形 (けい, 'type') + 素子 (そし, 'element/device').