using particles entrained by a fluid stream

Full Title

Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft > by measuring the time taken by the fluid to traverse a fixed distance > using particles entrained by a fluid stream

Classification Context

Section:

PHYSICS

Class:

MEASURING; TESTING

Subclass:

MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT; INDICATING DIRECTION OF MOVEMENT