Two or more systems that are rhythmically fluctuating at the same "frequency" that phase-lock.

en-TRANE-ment The resynchronization of a biological clock by the environment. 588

Principle of physics in which two or more oscillating bodies in proximity tend to synchronize rhythmically. Esoteric: Knowledge of an inner nature that is secret or not generally known.

The process of synchronization of a timekeeping mechanism to the environment, such as to a light-dark cycle, or LD. For comparison, see free running.

synchronization of a rhythm (such as a circadian rhythm) to a repetitive signal or environmental cue (such as the rising or setting of the sun)

The process in which material, such as water droplets or particulate matter, is picked up and carried along by a gas or liquid stream.

Mist, fog or droplets transported by a fluid.

The process of fine droplets of liquid vapor being physically carried along or carried over by steam during distillation or evaporation. In boiler operation this is called carryover; in cooling water processes it is called drift.

The conveying of particles of water or solids from the boiler water by the steam.

Entrainment is the movement of one fluid by another.

Gas is added into the powerhouse flow, increasing the level of total dissolved gas, as the result of the amount of spill going over the spillway into the tailrace of the dam.

Occurs when a fish is drawn into a water intake and cannot escape.

mobilization, by flowing water, of sediment or organic debris from the bed or banks of a stream channel.

Direct entrainment occurs when fish are pulled along with water into a diversion structure because of strong currents created by pumps. Indirect entrainment is caused by the transport of eggs or larve into less desirable areas because of induced flows in channels surrounding diversion structures.

The collection and transport of objects caught by the flow of a fluid moving at high velocity. For example, fish are often inadvertently entrained by water diversions.

Involuntary capture and downstream passage of water or fish at a dam.

1. In meteorology, the mixing of environmental air into a preexisting organized air current so that the environmental air becomes part of the current; the opposite of detrainment. Entrainment of air into clouds, especially cumulus, is said to be inhomogeneous when the timescale for mixing of environmental air is very much greater than the timescale for drop evaporation. Under these conditions, which are often found when environmental air is first entrained into cumulus, regions of cloud and entrained air are intertwined, with evaporation occurring only on the edges of the interface between the cloudy and entrained environmental air. 2. The process by which turbulent fluid within a mixed layer incorporates adjacent fluid that is nonturbulent, or much less turbulent; thus entrainment always proceeds toward the nonturbulent layer. In the absence of advection effects, this tends to deepen the mixed layer.

Entrainment is a phenomenon of the atmosphere which occurs when one wind flow captures another. It is typically used to refer to the capture of a wind flow of high moisture content, or in the case of tropical cyclones, the capture of drier air.