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Latest Transport phenomena Stories

2011-03-28 00:00:27

T.J. Morris named new sales engineer for food-grade fluids and hot-oil system assistance for poultry and food applications West Conshohocken PA, (PRWEB) March 27, 2011 Paratherm Corporation has recently announced that Mr. T. J. Morris will be the business development engineer handling all sales and support work for the food processing and poultry industries. Mr. George Schreiber who formally filled this role is moving to the General Manager position within the firm and will continue to be...

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2011-03-01 08:56:40

It may seem illogical, but boiling is a very efficient way to cool engineering components and systems used in the extreme environments of space. An experiment to gain a basic understanding of this phenomena launched to the International Space Station on space shuttle Discovery Feb. 24. The Nucleate Pool Boiling Experiment, or NPBX, is one of two experiments in the new Boiling eXperiment Facility, or BXF. Nucleate boiling is bubble growth from a heated surface and the subsequent detachment of...

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2010-12-07 09:54:58

Geophysical phenomena such as the dynamics of the atmosphere and ocean circulation are typically modeled mathematically by tracking the motion of air or water particles. These mathematical models define velocity fields that, given (i) a position in three-dimensional space and (ii) a time instant, provide a speed and direction for a particle at that position and time instant. "Geophysical phenomena are still not fully understood, especially in turbulent regimes," explains Gary Froyland at the...

2010-09-01 14:34:14

Floods cut down more bridges than fire, wind, earthquakes, deterioration, overloads and collisions combined, costing lives and hundreds of millions of dollars in damage. The speed and turbulence of an overflowing stream scours away the river bottom that provides the support for a bridge foundation, causing more than 60 percent of bridge failures in the U.S. in the last 30 years. Currently, "there is no way to determine risk during these crucial events," said Xiong "Bill" Yu, an assistant...

2010-06-16 22:00:27

An understanding of particle diffusion in the presence of constrictions is essential in fields as diverse as drug delivery, cellular biology, nanotechnology, materials engineering, and spread of pollutants in the soil. When a driving force is applied, displacement of particles occurs as well as diffusion. A paper in the Journal of Chemical Physics, which is published by the American Institute of Physics (AIP), quantifies the effects of periodic constrictions on drift and diffusion in systems...

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2010-05-20 14:37:51

To lower the fuel consumption of airplanes and ships, it is necessary to reduce their flow resistance, or drag. An innovative paint system makes this possible. This not only lowers costs, it also reduces CO2 emissions. The inspiration "“ and model "“ for the paint"Ëœs structure comes from nature: The scales of fast-swimming sharks have evolved in a manner that significantly diminishes drag, or their resistance to the flow of currents. The challenge was to apply this...

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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...

2009-11-12 16:00:00

SIPING, China, Nov. 12 /PRNewswire-Asia/ -- THT Heat Transfer Technology (OTC Bulletin Board: BVNC), a leading provider of heat exchangers and heat exchange solutions in China's cleantech industry today announced that it will release its results for the third quarter of fiscal 2009 on Monday, November 16, 2009 after the close of the US markets. The earnings release will be available on the Company's website at http://www.tht.cn . About THT THT Heat Transfer Technology (BVNC.OB)...

2008-09-12 03:00:21

By Tirabassi, Tiziano Buske, Daniela; Moreira, Davidson M; Vilhena, Marco T ABSTRACT A mathematical scheme is developed to simulate the vertical turbulent dispersion of air pollution that is absorbed or deposited to the ground. The scheme is an exact analytical solution of the atmospheric diffusion equation, without any restriction to the vertical profile of wind speed and eddy diffusivities, and taking into account the dry deposition by a boundary condition of a nonzero flux to the ground....

2007-10-30 06:00:33

By Metzler, Roger D Blaschke, Marilyn W Prevent corrosion, emulsification and fouling by implementing these operational and chemical measures. In the production of petrochemicals, water is often used to control various chemical reactions or is a reaction byproduct. Because it is in intimate contact with the process streams, this water is commonly referred to as process water. Examples of processes that generate process water include ethylene, styrene and acrylonitrile production. In...