1 / 29

CDS 130

CDS 130. Fernando E. Camelli Department of Computational and Data Sciences George Mason University E-mail: fcamelli@gmu.edu Web :. Atmospheric Dispersion. Study flow around buildings Study flow around ships Patterns/footprint of clouds of materials Tools: CAD: Computer Aided Design

bran
Download Presentation

CDS 130

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CDS 130 Fernando E. Camelli Department of Computational and Data Sciences George Mason University E-mail: fcamelli@gmu.edu Web:

  2. Atmospheric Dispersion • Study flow around buildings • Study flow around ships • Patterns/footprint of clouds of materials • Tools: • CAD: Computer Aided Design • CFD: Computational Fluid Dynamics • Visualization

  3. FEFLO Model • Pre-Processing • CAD  FECAD • Grid generation  FRGEN3D • Solution • Flow solution  FEFLO • Post-Processing • Visualization  ZFEM

  4. Some Examples

  5. Inputs for CFD Models • Topography of landscape • Building heights with footprints (locations) • Other characteristics: • Surface roughness • Vegetative covers • Building materials • Data are 3D in nature • Some are commonly stored in GIS

  6. We are here George Mason University, Fairfax, VA

  7. Data • Topographic and Building data for GMU-Fairfax campus, VA • Original data: 5-feet contours • Converted to raster (grid) and TIN

  8. Mesh from Raster Data

  9. Temporal – Raster Concentration 10 sec 50 sec 100 sec Contours of concentration @ 140 m above sea level

  10. Spatial – Raster Concentration 135 meters 140 meters 145 meters Contours of concentration @ 100 sec

  11. Three Dimensional Cloud

  12. Footprint

  13. Concentration Profiles 1 2 Average over 180 s 1 3 2 4 3 4

  14. New York City →

  15. BuildingAirwake

  16. One Penn Plaza BuildingEmpire State Building Velocity vectors One Plaza Building Empire State Building Concentration levels (log scale)

  17. Velocity at 5 m AGL

  18. Comparison: WNW and SW plumes 10 seconds 400 seconds 700 seconds

  19. Iso-concentration

  20. Instantaneous Streamlines Wind direction

  21. Release Location Wind direction Plume – Cut Planes 5.2 m above the ground 1.5 m above the ground

  22. Concentration Level Iso-surface 500 K 4M 31M

  23. LPD 17 – San Antonio Class

  24. Temperature Iso-Surface

  25. Absolute Velocity - Flow Past LPD 17

  26. T-AKE 1 – Dry Cargo/Ammunition Ship

  27. Smoke – 30 deg – Comparison

  28. Particles – 30 deg – No HVAC

More Related