CTAG

CTAG is a computational fluid dynamics model for the behaviour of air pollutants on and near roadways.{{cite web|title=Comprehensive Turbulent Aerosol Dynamics and Gas Chemistry Model (CTAG)|publisher=Cornell University}}

CTAG stands for Comprehensive Turbulent Aerosol Dynamics and Gas Chemistry, is an environmental turbulent reacting flow model designed to simulate the transport and transformation of air pollutants in complex environments. It is developed by the Energy and the Environmental Research Laboratory ( EERL) at Cornell University.

CTAG’s plume transport model designed for on-road and near-road applications is called CFD-VIT-RIT.{{cite journal|doi=10.1021/es9014844 | volume=43 | title=Modeling Near-Road Air Quality Using a Computational Fluid Dynamics Model, CFD-VIT-RIT | year=2009 | journal=Environmental Science & Technology | pages=7778–7783 | last1 = Wang | first1 = Y. Jason | last2 = Zhang | first2 = K. Max| issue=20 | pmid=19921893 | bibcode=2009EnST...43.7778W }} CTAG has been applied to investigate the plume dispersion near different highway configurations, chemical evolution of nitrogen oxides near roadways,{{cite journal|doi=10.1016/j.atmosenv.2010.09.050 | volume=45 | title=Modeling the chemical evolution of nitrogen oxides near roadways | year=2011 | journal=Atmospheric Environment | pages=43–52 | last1 = Jason Wang | first1 = Yan | last2 = DenBleyker | first2 = Allison | last3 = McDonald-Buller | first3 = Elena | last4 = Allen | first4 = David | last5 = Zhang | first5 = K. Max| issue=1 | bibcode=2011AtmEn..45...43W }} spatial variations of air pollutants in highway-building environments,{{cite journal | last1 = Tong | first1 = Z. | last2 = Wang | first2 = Y. | last3 = Patel | first3 = M | last4 = Kinney | first4 = P. | last5 = Chillrud | first5 = S | last6 = Zhang | first6 = K. M. | year = 2012 | title = Modeling roadside black carbon concentrations in a highway-building environment | journal = Environmental Science & Technology | volume = 46 | issue = 1| pages = 312–319 | doi=10.1021/es201938v| pmc = 3258341 | pmid=22084971}} and effects of vegetation barriers on near-road air quality.{{cite journal | last1 = Steffens | first1 = J. T. | last2 = Wang | first2 = Y. | last3 = Zhang | first3 = K. M. | year = 2012 | title = Exploration of effects of a vegetation barrier on the dispersion of pollutants in a near road environment | journal = Atmospheric Environment | volume = 50 | pages = 120–128 | doi=10.1016/j.atmosenv.2011.12.051}}