Air speed after it passes a tunnel

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The discussion focuses on calculating airspeed in a specific area after it passes through a tunnel, starting with a known airspeed of 6 m/s. Participants suggest using the Navier-Stokes equations for fluid flow analysis near a boundary layer. A recommended resource for further understanding and application of these equations is "Elementary Fluid Dynamics" by D.J. Acheson. The conversation emphasizes the importance of fluid dynamics principles in determining airspeed changes. Overall, the thread aims to provide guidance on applying theoretical concepts to practical scenarios.
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Hey guys, i am new to this subject and need some help. The idea is that in area AxB there is a constant airspeed of for example 6 m/s. I would like a formula or another way I can calculate the airspeed at area ExB. I hope you guys can help me out. Thanks.

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I cannot be certain what your exact problem is, but for fluid flow near a boundary layer, Navier-Stokes equations can be used. Some good worked examples and a far better description of how to apply the NS equation can be found in 'Elemetary Fluid Dynamics' by D.J. Acheson
 

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