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Partial Differential Equations - Modelling and ... - ResearchGate

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254 J.-M. Brun <strong>and</strong> B. Mohammadi<br />

0.03<br />

0.025<br />

0.02<br />

0.015<br />

0.01<br />

0.005<br />

0<br />

0.045<br />

0.04<br />

0.035<br />

0.03<br />

0.025<br />

0.02<br />

0.015<br />

0.01<br />

0.005<br />

0<br />

Fig. 3. Generalized similitude solution (right) for a 2-point based wind (similar to<br />

Fig. 1) compared to a direct simulation with a PDE based transport-diffusion model<br />

for the same wind. The similitude solution has been evaluated on all the nodes of<br />

the finite element mesh for comparison.<br />

Fig. 4. Regions affected from the treatment of two sources. The flow field has been<br />

built from three points of measurement indicated on the picture.<br />

220<br />

200<br />

180<br />

160<br />

140<br />

120<br />

N<br />

100<br />

80<br />

2 km<br />

N<br />

Fig. 5. Left: a typical digital terrain model (x <strong>and</strong> y coordinates range over 2 km).<br />

Dispersion in a uniform north wind with (middle) <strong>and</strong> without (right) the ground<br />

model (Section 2.2).

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