For a two-dimensional flow ( w =0 ), the mean velocity components lie on the x-y plane. One can consider the following
The turbulent boundary layer equation together with the equation of continuity become
![](images/image010.gif) |
(9.1) |
![](images/image012.gif) |
(9.2) |
Comparison with laminar boundary layer will reveal that laminar viscous flow per unit volume is replaced by where ![](images/image018.gif)
![](images/fig1.gif)
Figure 9.1
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