downdraft


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downdraft

[′dau̇n‚draft]
(physics)
A current of air or other gas that travels downward, as during a thunderstorm or in a mine shaft.

downdraft, Brit. downdraught

1. A downward current of air in a chimney or flue, often carrying smoke with it.
2. A downward current of air resulting from the passage of air across a window surface, which cools it and increases its density so that it moves downward.

downdraft

downdraft
A relatively small-scale downward current of air. These are common near cumuliform clouds, in precipitation areas, and on leeward side of large features. They pose risks to light aircraft and helicopters, especially those flying near the ground.
References in periodicals archive ?
The techniques for dealing with wind shear are mostly situational, but it boils down to awareness--being aware of thunderstorm structure, knowing how to visually identify the downdraft and developing rain cores, and knowing the relationship of your aircraft to these areas in terms of the airspeed changes they may bring.
I think the majority of us instantly thought of the downdraft and that it would set off more mines.
The intensity of the downdraft can reach 100 feet per second.
Since the downdraft system maintains a constant flow of air through the kiln, cool room air which is drawn in must be heated to maintain kiln temperature, potentially reducing maximum firing capacity and creating temperature fluctuations.
s upscale brand is adding its first cooktop downdraft and motor made in-house.
The Downdraft Tower technology harnesses the power of a downdraft created within the confines of its tower structure.
According to the company, this essential tool has been under development for over a year and applies "known" scientific meteorology data of a specific area to the Downdraft Tower's variables in order to determine and project energy outputs on a daily basis.
The downdraft dust collection system helps protect the operator from dust produced by the screening process.
Also available is a new line of DustPak DTH series downdraft tables which draw contaminants away from worker breathing zones.
The wraparound downdraft table allows for staging of components and prevents the escape of media and dust, returning both directly to the reclamation system.