From Eqn. (19.1), we can write
or
![](images/image004.gif) |
(20.1) |
This corresponds to a stream function
![](images/image006.gif) |
(20.2) |
The expression for yields
Here the prime (´) denotes derivative with respect to the independent variables, the quantity can be evaluated in the following way.
We can choose y =0 line as a streamline and then we can write ψ(x ,0)=0. This entails F (0)=0.
|