Presentation is loading. Please wait.

Presentation is loading. Please wait.

National Environmental Research Institute, University of Aarhus, Denmark Use of the Thompson wind tunnel data set – a few examples Ruwim Berkowicz and.

Similar presentations


Presentation on theme: "National Environmental Research Institute, University of Aarhus, Denmark Use of the Thompson wind tunnel data set – a few examples Ruwim Berkowicz and."— Presentation transcript:

1 National Environmental Research Institute, University of Aarhus, Denmark Use of the Thompson wind tunnel data set – a few examples Ruwim Berkowicz and Helge Rørdam Olesen

2 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Excel workbooks The subsequent charts are copied from Excel workbooks that are freely available through und/Thompson_Intro.htmhttp://www.dmu.dk/International/Air/Models/Backgro und/Thompson_Intro.htm Each workbook contains a chart, depicting a stack, a building and a concentration profile. This chart is dynamic, so the user can vary the stack height or the stack location (using arrow keys in Excel). The chart shows the resulting changes in concentrations according to both measurements and models.

3 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Layout of chart: Sketch of stack and building Wind Full-drawn black curve: Measured concentration at ground-level along a line through the center of the building. Both stack and building height is 150 units.

4 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data The chart holds curves modelled by several models: AERMOD and OML (standard version). Dashed curves refer to situation without building Wind

5 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Cube building The stack is at roof height. We move the stack relative to the building. In the Excel sheet, the building can be moved by simply pressing an arrow key. The subsequent slides mimic the way the Excel sheets work.

6 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data First, the building is 10 building heights downwind of the stack

7 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Moving closer: Watch Xs, indicating distance from the building’s upwind face to the stack, counted positive along X axis XSXS

8 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data XSXS

9 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

10 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

11 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

12 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

13 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

14 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

15 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

16 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

17 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

18 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

19 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data

20 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Effect of changing stack height We consider a stack located at the center of the roof. The building is a cube

21 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Stack at roof top (Hs = Hb)

22 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Elevated stack (Hs = 1.5 Hb)

23 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Even higher stack: Hs = 2 Hb

24 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Effect of changing building width – stack height 1.5 Hs

25 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Cube – measurements only

26 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Wide building (2 cubes)

27 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Very wide (4 cubes)

28 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Cube, including model results

29 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Wide building (2 cubes)

30 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Very wide building (4 cubes)

31 National Environmental Research Institute, University of Aarhus, Denmark Validation using Thompson’s wind tunnel data Continue on your own... Four Excel workbooks are available for download, one for each building. See ackground/Thompson_Intro.htm ackground/Thompson_Intro.htm


Download ppt "National Environmental Research Institute, University of Aarhus, Denmark Use of the Thompson wind tunnel data set – a few examples Ruwim Berkowicz and."

Similar presentations


Ads by Google