wind chill

(redirected from Windchill)
Also found in: Dictionary, Medical, Wikipedia.
Related to Windchill: windchill factor

wind chill,

the cooling effect of wind and temperature combined, expressed in terms of the effect produced by a lower, windless temperature, also called wind chill factor, wind chill temperature, wind chill equivalent temperature, wind chill index, wind chill equivalent index, and wind chill temperature index. Wind chill is based on the rate of heat loss from exposed skin. Under windless conditions air provides an invisible blanket around the skin. As wind speed increases, this layer of heated air is carried away from the body at an accelerated rate, forcing the body either to work harder to generate more heat or cool down. If the actual air temperature is −5°F;(−21°C;) with a 20 mph (32 km/hr) wind, the wind chill temperature is −29°F;(−34°C;). Because wind chill is based the removal of heat from the human body, it does not reflect the increased rate of heat loss for inanimate objects such as automobile radiators under the same conditions but they also experience a faster heat loss with increasing winds.

The term wind chill was coined by the American geographer Paul A. Siple in his dissertation, Adaptation of the Explorer to the Climate of Antarctica, (1939). Subsequently, on the third Byrd Antarctic expedition, Siple and American geologist Charles Passel determined how quickly extreme conditions could produce frostbite on exposed skin. By 1945, Siple and Passel had published a set of numbers expressing heat loss as a function of temperature and wind speed.

A wind chill advisory is issued when the forecast projects a wind velocity of at least 10 mph (16 km/hr) producing a wind chill temperature of −15°F; or lower for 3 hours or more. At these values wind chill is more of a nuisance than it is life threatening. A wind chill warning is issued when the forecasted wind chill temperature is −25°F; or lower, which can be life threatening if the individual is not suitably dressed. Persons who go outside under such conditions may experience frostbite and other cold-related symptoms in a matter of minutes, even if properly clothed for normal winter conditions, and longer exposures may prove fatal.

wind chill

[′win ‚chil]
(meteorology)
That part of the total cooling of a body caused by air motion.
References in periodicals archive ?
For automobile companies like Pricol, PTC Windchill can create a well-defined and orderly process for how informal and formal changes to product design are proposed, evaluated, implemented and documented.
As a result of our assessment among several PLM vendors, we selected PTC's Windchill for its strong technological performance and for the company's value-oriented approach which both are critical when engaging in such a strategic and long-term partnership.
The highlights of the Microsoft SharePoint 2010 collaboration platform comprise Windchill PPMLink, a new program portfolio management solution that couples stage-gate methods with capabilities to aggregate program and product-related metrics; Windchill SocialLink, a new solution utilizing social computing capabilities to bring the collective wisdom of communities to bear on product development challenges; Windchill Web Parts for SharePoint, a solution that consolidates critical information from Windchill and other enterprise systems for presentation in a familiar Microsoft SharePoint 2010 environment and Windchill ProductPoint, a solution to address the specific CAD data management needs of small and mid-sized businesses (SMBs).
As shown on the chart, if the temperature is -10[degrees]F and the wind is blowing about 10 miles per hour (mph), the windchill factor would make the air feel like -28[degrees]F.
Windchill does not equate to actual temperature, so the phrasing in the story was misleading.
Success for Unisys requires engaging engineers, suppliers, manufacturing partners, and customers in real-time collaboration for the entire product lifecycle," said Tim Saja, Windchill program manager, Unisys.
invested in Conferos, a software company that had developed a tool just for plastics processors that was powered by Windchill e-collaboration software from PTC.
US-based product development solutions company PTC has begun shipments of Windchill version 6.
Under the terms of the agreement, the Cadence(R) Methodology Services organization will develop a solution to integrate Cadence's industry-leading suite of PCB design tools with PTC's suite of Windchill CPC solutions.
With new features for enterprise visualization, flexible workgroup management and collaborative notification, combined with a new deep understanding of the digitally defined product and Windchill Foundation federation enhancements, Windchill EPM advances engineering collaboration among value chains of customers, partners and suppliers.
The company said it would integrate Division's product visualization software into Windchill.
As an alternative to keeping backyard barbecues and pool parties cool, home comfort product manufacturer WindChaser is touting the Windchill, a new misting fan.