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Numerical modelling of airflow within and above forests and forest clearings using computational fluid dynamics.
Digital Document
Abstract |
Abstract
The computational fluid dynamics program, FLUENT, was first tested to validate windtunnel measurements of a scaled 10 ha forest clearing in a two dimensional domain. A variety of domain and canopy configurations were examined along with processor settings. Validation of the CFD program produced excellent results for horizontal wind velocity. Conifer shaped tree elements for the forest stands performed well and similar to the more traditional way of representing forest canopies. Turbulent kinetic energy (TKE) values output by the program seem to over predict the values calculated by using wind tunnel statistics. Various sizes of forest clearings were simulated to determine the stress that would be experienced by a forest edge immediately downwind of a clearing. Shorter gaps (<15 tree heights) seem to experience high values of TKE over the downwind forest, compared to the stand upwind of the clearing and lower stress values along the downwind forest edge. Large gaps (>60 tree heights) saw higher stress values but TKE values no larger than those reported upwind of the clearing. From the stress values calculated from various input velocities and gap sizes, a new tool was produced which takes into account a sites endemic wind speed and canopy density to predict stress on forest edges downwind of clearings. |
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Persons |
Persons
Author (aut): Phaneuf, Timothy James
Thesis advisor (ths): Jackson, Peter L.
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Degree Name
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Department
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DOI |
DOI
https://doi.org/10.24124/2009/bpgub612
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Collection(s)
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Degree granting institution (dgg): University of Northern British Columbia
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Library of Congress Classification |
Library of Congress Classification
SD390.7.W56 P43 2009
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Extent |
Extent
Number of pages in document: 225
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Physical Form
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Handle
Handle placeholder
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ISBN |
ISBN
978-0-494-48784-6
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Use and Reproduction |
Use and Reproduction
Copyright retained by the author.
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Rights Statement |
Rights Statement
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unbc_15973.pdf5.29 MB
5829-Extracted Text.txt295.49 KB
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Language |
English
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Name |
Numerical modelling of airflow within and above forests and forest clearings using computational fluid dynamics.
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application/pdf
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5550908
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