CTAG is a
computational fluid dynamics
Computational fluid dynamics (CFD) is a branch of fluid mechanics that uses numerical analysis and data structures to analyze and solve problems that involve fluid flows. Computers are used to perform the calculations required to simulate t ...
model for the behaviour of
air pollutants
Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. There are many different ty ...
on and near roadways.
CTAG stands for Comprehensive Turbulent Aerosol Dynamics and Gas Chemistry, is an environmental
turbulent
In fluid dynamics, turbulence or turbulent flow is fluid motion characterized by chaotic changes in pressure and flow velocity. It is in contrast to a laminar flow, which occurs when a fluid flows in parallel layers, with no disruption between ...
reacting flow
model
A model is an informative representation of an object, person or system. The term originally denoted the plans of a building in late 16th-century English, and derived via French and Italian ultimately from Latin ''modulus'', a measure.
Models c ...
designed to simulate the transport and transformation of air pollutants in complex environments. It is developed by the Energy and Environmental Research Laboratory ( EERL) at
Cornell University
Cornell University is a private statutory land-grant research university based in Ithaca, New York. It is a member of the Ivy League. Founded in 1865 by Ezra Cornell and Andrew Dickson White, Cornell was founded with the intention to ...
.
CTAG’s
plume transport model designed for on-road and near-road applications is called CFD-VIT-RIT. CTAG has been applied to investigate the plume dispersion near different highway configurations, chemical evolution of
nitrogen oxides Nitrogen oxide may refer to a binary compound of oxygen and nitrogen, or a mixture of such compounds:
Charge-neutral
*Nitric oxide (NO), nitrogen(II) oxide, or nitrogen monoxide
*Nitrogen dioxide (), nitrogen(IV) oxide
* Nitrogen trioxide (), or ...
near roadways, spatial variations of air pollutants in highway-building environments, and effects of vegetation barriers on near-road air quality.
References
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External links
EERL
Atmospheric dispersion modeling
Computational fluid dynamics