Streamlines around a simple airfoil. Lifting force (green) and drag (red) have only symbolic size. The dotted line is the chord line, current angle of attack is 2.3 degrees. Note: streaming far of wing is straight; the flow is constrained top and bottom, as would be for example in a wind tunnel.
<a href="//commons.wikimedia.org/wiki/User:Orion_8" title="User:Orion 8">Orion 8</a>
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<span class="int-own-work" lang="en">Own work</span>