Wind velocity seems too high?

Hello everyone, so i did an indoor wind simulation through parametric roster/hollow bricks.
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I was wondering why the wind velocity could go up to 33 m/s? i put a 3.5 m curve as the input for velocity vector (meaning i wanted to use 3.5 m/s as the input for the wind velocity) so i have no idea why the changes could be huge.

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Any ideas? thanks in advance.