Wind Energy

42 J.C.L. da Costa et al.
y/h
1.5
1
0.5
2 x/h=0.02 0.25 0.55
1.2 2.6 6.5 13.2 21.8
0
0 2 4 6 0 2 4 6 0 2 4 6 0 2 4 6 0 2 4 6 0 2 4 6 0 2 4 6 0 2 4 6
u (m/s)
Fig. 7.3. Longitudinal velocity along a forest clearing. Wind tunnel data (dashed
line, solid line); Svensson [6] (dashed line), Liu [4] (solid line), v2-f model (dotted
line)
Concerning the mean velocity (Fig. 7.3), all models show a much better
agreement with the wind tunnel data, compared with Fig. 7.2.
7.4 Conclusions
There are difficulties in the computer simulation of wind flow over forests,
related with model parameterisation, which require the availability of good
experimental data.
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