A Numerical Study on Atmospheric Transport and Diffusion Response to Rapid Urbanization

2008 ◽  
Author(s):  
Yongwei Wang ◽  
Zhu Bin ◽  
Jiang Weimei
Keyword(s):  
Atmospheric Transport ◽  
Numerical Study ◽  
Rapid Urbanization ◽  
Transport And Diffusion ◽  
And Diffusion

Evaluation of Atmospheric Transport and Diffusion

1970 ◽  
Author(s):  
William H. Clayton ◽  
Tom E. Sanford ◽  
Bernice Ackerman
Keyword(s):  
Atmospheric Transport ◽  
Transport And Diffusion ◽  
And Diffusion

The Numerical Simulation of Airflow and Dispersion in Three-Dimensional Atmospheric Recirculation Zones

1991 ◽  
Vol 30 (7) ◽  
pp. 1005-1024 ◽  
Author(s):  
Paul Dawson ◽  
David E. Stock ◽  
Brian Lamb
Keyword(s):  
Surface Layer ◽  
Atmospheric Transport ◽  
Three Dimensional ◽  
Field Measurements ◽  
Ground Level ◽  
Turbulence Closure ◽  
Numerical Code ◽  
Recirculation Zones ◽  
Transport And Diffusion ◽  
And Diffusion

Abstract A three-dimensional, nonhydrostatic numerical code using the two-equation turbulence closure was developed to model the atmospheric transport and diffusion of pollutants over buildings and a three-dimensional hill. The standard engineering two-equation, first-order turbulence closure was modified to account for surface layer effects and the reduced production of dissipation in the region above the surface layer found in an atmospheric boundary layer. The computations for the dispersion of a building rooftop release showed good agreement with wind tunnel measurements, except when very close to the ground. The transport and dispersion of a plume over a 300-m conical hill, Steptoe Butte, was also simulated. The computations are compared with near ground-level field measurements.

scholarly journals Effect of an iris-fixated intraocular lens on corneal metabolism: a numerical study

2018 ◽  
Vol 2 (2) ◽  
pp. 97-101
Author(s):  
Peyman Davvalo Khongar ◽  
Jan O. Pralits ◽  
Xi Cheng ◽  
Peter Pinsky ◽  
Paolo Soleri ◽  
...  
Keyword(s):  
Corneal Endothelium ◽  
Numerical Study ◽  
Intraocular Lenses ◽  
Corneal Endothelial Cells ◽  
Lens Implantation ◽  
Phakic Intraocular Lenses ◽  
Aqueous Flow ◽  
Transport And Diffusion ◽  
And Diffusion ◽  
Corneal Metabolism

One of the possible risks associated with the implant of iris-fixated phakic intraocular lenses (pIOL) is loss of corneal endothelial cells. We hypothesize that this might be due to alterations in corneal metabolism secondary to the lens implantation. To verify the feasibility of this assumption, we propose a mathematical model of the transport and diffusion of metabolic species in the anterior chamber and the cornea, coupled to a model of aqueous flow. Results are obtained both with and without the pIOL in the case of closed eyelids. The results suggest that glucose availability may be significantly reduced at the corneal endothelium. However, it must still be verified whether this finding has clinical relevance.

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