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Computational and Experimental Study of Airflow and Particulate Pollutant Transport and Concentration around the Syracuse Center of Excellence in Environmental and Energy Systems Headquarters
Start Date 05/01/2007
End Date 04/30/2008
Primary Partner: Clarkson University
Primary Contact: Ahmadi, Goodarz - Professor
Other Project Contacts: Bohl, Douglas - Co-Principal Investigator
Project Type: CARTI II
Presentation to Scientific Advisory Committee, April 2010
CARTI Presentations 2010-Ahmadi 2
Technical Description:
The primary goal of the proposed project is to develop a computational model for analyzing airflow and pollutant transport and concentration near the new Syracuse Center of Excellence in Environmental and Energy Systems (CoE) Headquarters in downtown Syracuse. The specific objective is to develop experimentally validated computational tools for predicting the airflow and the transport and concentration of aerosols in the vicinity of the CoE Headquarters. We plan to develop the computational tool for handling the full-scale building and its scaled version for wind tunnel testing. The Reynolds-averaged Navier-Stokes (RANS) and large eddy simulations (LES) based computational model will be verified for the wind tunnel-scale model through a series of wind tunnel tests. The wind tunnel studies will include flow visualization, pressure measurements, and the use of particle image velocimetry (PIV) measurements in the aerosol wind tunnel facility at Clarkson University. For particulate transport and deposition, both Lagrangian and Eulerian formulations will be implemented.
Expected Outcomes:
The experimentally verified computational model will be applied to the full scale CoE Headquarters, and the proposed computational tool will be helpful for planning future environmental studies at the site.
Accomplishments:
A computer model for analyzing the airflow around the Center of Excellence (CoE) Building in Syracuse was developed. The k-ε and the k-ω turbulence models, in addition to the Reynolds stress transport model, were used in the analysis. The airflow fields for the wind tunnel scale model of the building were simulated for different wind speeds and various directions including north to south and west to east.
A computer model for large eddy simulation of the airflow around the Center of Excellence (CoE) building in Syracuse is in progress. The effort is very time consuming, however, and requires additional time for completion.
A series of wind tunnel experiments of the CoE building scale model were performed. A 3D CAD model was created from architectural blueprints and was used to create a scale (1/16th inch=1 foot) physical model using the stereo-lithography techniques. Pressure measurements were taken at several wind speeds for different wind directions.
The computer pressure and velocity fields are being compared with the corresponding experimental data obtained by Particle Image Velocimetry (PIV). While the agreement in the pressure data are reasonable, the comparisons of the velocity field need additional effort.
Benefits:
The development of valid computational tools for understanding airflow and pollution transport around the CoE Headquarters building will aid in predicting local pollution which will in turn help protect the health of those outside as well as inside the building. This study will also lay the ground work for future studies at that location.
For more information: http://web2.clarkson.edu/projects/fluidflow/
Image Credit: Ahmadi, Goodarz; Clarkson University, 2009
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