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I did a wind tunnel test of a rectangular box with equal sized louvered window at the inlet and outlet. This box is a scale model and representative of a typical room with windows for cross-ventilation. I measured the velocity inside the room.

Now I want to calculate the Reynolds number for this scaled model. I know the formula for the calc. i.e Re= pvD/u.. But since the model is at a small scale, the Re value for this model will be small.

How do I co-relate the Re of model to Re of the actual scale. Is there a different Re scale for models like we have for the actual scale where Re<2300 = laminar and Re>4600 = turbulent.. Obviously the Re value for the model will not be this big.

what I want to do is find out the Re for the scale model with the measured velocity values. Do a CFD of the actual scale and find out it Re. I hope that the experiment and the simulation values would come close.

Any insight on this is appreciated.

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# Aerospace Corelating Re number for model scale to actual scale

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