A study of the roughness effects of multiple windbreaks |
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Authors: | M Iqbal A K Khatry B Seguin |
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Institution: | (1) Dept. of Mechanical Engineering, The Uniuersity of British Columbia, Vancouver, B.C., Canada;(2) Station de Bioclimatologie, INRA, 84 Montfavet, France |
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Abstract: | A wind-tunnel study of the roughness effect of a network of uniformly spaced long parallel windbreaks has been attempted. The roughness parameterZ
0 in the well-known logarithmic profile has been obtained as a function of the ratio of the spacingL to heightH of the barriers. In one part of the study, a naturally developing boundary layer was used and the windbreaks were not spread on the entire wind-tunnel floor. Spacing ratiosL/H of 1 to 20 were treated. In the other part of the study, spires were used to thicken the boundary layers artificially and the windbreaks were spread throughout the wind-tunnel floor. In this case, spacing ratiosL/H of 1 to 30 were examined.Values of the roughness parameter obtained from the above two cases have been compared to some (though very few) previously published pertinent values. |
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