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How the force derived on a 2D model?

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Old   October 10, 2010, 05:25
Default How the force derived on a 2D model?
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Rikio
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I used to think that the force is based on the existing 2 dimensions of the 2D model and one unit in the other dimension. If the model is built in mm, the third dimension is 1mm. And if in m, it is 1m.

But a model of a 1000mm x 50mm in a 20m/s wind field gets a relatively big drag force, that makes me doubting the derivation.
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