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Latest Convection Stories

2010-07-28 14:24:34

Fluids experts writing in the journal Physics of Fluids, which is published by the American Institute of Physics, are projecting it will be many decades before we can accurately probe the properties of turbulence near walls. High-Reynolds-number flows (which are prone to turbulence) are critically important in aeronautics, naval applications, energy conversion processes, manufacturing, mixing and dilution of pollutants, and in many aspects of climate modeling, according to Professor Hassan...

2010-04-18 06:00:00

CHICAGO, April 18 /PRNewswire/ -- Jenn-Air, the brand that introduced the first self-ventilated cooktop and downdraft ventilated range in the 1960's, has developed a unique wall oven offering the industry's most powerful convection system, together with an exclusive touch screen that incorporates an image-enabled cooking guide. The oven's 7-inch, glass-touch screen is the largest of its kind and features a touch-anywhere, full color LCD display (Photo:...

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2009-12-03 12:00:05

Not only in the Earth's mantle, in the atmosphere and in the outer layers of the Sun, but also in a chemical reactor, the exchange of heat may not be as effective as originally thought. There, because warm fluid rises and hence induces movement, the turbulent convection can be 100 billion times stronger than in the typical cooking pot. Hot fluids mix turbulently with warm fluids. As the temperature difference between the cold and warm sides increases, the heat transport increases...

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2009-01-22 14:14:03

Drifting of the large tectonic plates and the superimposed continents is not only powered by the heat-driven convection processes in the Earth's mantle, but rather retroacts on this internal driving processes. In doing so, the continents function as a thermal blanket, which leads to an accumulation of heat underneath, and which in turn can cause the break-up of the super-continents. These results of numerical modeling have been published by scientists from the GFZ German Research Centre for...

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2008-03-17 15:00:00

Patterns of scalloped-edged cliffs or lobate scarps on Mercury's surface are thrust faults that are consistent with the planet shrinking and cooling with time. However, compression occurred in the planet's early history and Mariner 10 images revealed decades ago that lobate scarps are among the youngest' features on Mercury. Why don't we find more evidence of older compressive features?Scott D. King, professor of geosciences at Virginia Tech, reports in Nature Geoscience this week that mantle...

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2007-08-23 11:30:00

CHAMPAIGN, Ill. -- A new model of Saturn's icy moon Enceladus may quell hopes of finding life there. Developed by researchers at the University of Illinois, the model explains the most salient observations on Enceladus without requiring the presence of liquid water. Orbiting Saturn since June 30, 2004, the Cassini spacecraft has revealed a south polar region of Enceladus with an elaborate arrangement of fractures and ridges, intense heat radiation and geyser-like plumes consisting of ice...

2007-04-18 15:33:38

Stunning simulations that give a multi-dimensional glimpse into the interior of stars show that material bubbling around the convection zone induces a rich spectrum of internal gravity waves in the stable layers above and below. The swirling simulations, which are reminiscent of Van Gogh's star paintings, show the interior of a star during the Asymptotic Giant Branch (AGB) phase, the final stage of a low- and intermediate-mass star's life before it becomes a white dwarf. It is during this...


Latest Convection Reference Libraries

Urban Heat Island
2013-04-02 15:35:21

An urban heat island (UHI) is a metropolitan area that is drastically warmer than its surrounding rural areas because of human activities. The phenomenon was first looked into and described by Luke Howard during the 1810s, although he wasn’t the one to name the phenomenon. The difference in temperature is normally bigger at night as opposed to during the day, and it most obvious when winds are weak. Seasonally, UHI is seen during the summer and the winter. The key cause of the urban heat...

Weather Reference Library
2012-06-05 12:02:27

Here are a few basic weather terms that you may have heard and don't know what they mean. Convection: Convection means that an area of t-storms has developed in an unstable part of the atmosphere. Zonal flow: This Term is used when talking about the jet stream. Zonal means that the strong winds at about 20-30,000ft are blowing west to east. This is important in weather because these types of winds or pressure systems will move very fast and not have a chance to get very strong....

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2009-07-18 15:14:24

A thermal column is a column of rising air in lower altitudes of the atmosphere. Thermal columns are created by uneven heating patterns of the Earth's surface from solar radiation. The sun warms the ground, and the air directly above the ground begins to warm. As the warm air expands, it becomes less dense than the air around it and rises. As the warmer air rises, it cools due to its expansion in lower high-altitude pressures. When it cools to the same temperature as the surrounding air, it...

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2004-10-19 04:45:42

Photosphere -- The photosphere of an astronomical object is the region at which the optical depth becomes one. In other words, the photosphere is the place where an object stops being transparent. It is typically used to describe the Sun or another star. Because stars are large balls of gas, they have no solid surface. However, there is a depth at which the gas stops being transparent to photons, and this depth provides a visual surface to the star. The Sun's photosphere has a...

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Word of the Day
cacodemon
  • An evil spirit; a devil.
  • A nightmare.
  • In astrology, the twelfth house of a scheme or figure of the heavens: so called from its signifying dreadful things, such as secret enemies, great losses, imprisonment, etc.
'Cacodemon' comes from a Greek term meaning 'evil genius.'
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