Best and cheapest way to end wind buffetting is Fast Freddies mod. No more wind buffetting. Only cost me $2.07 and the double sided tape. Thanks freddie
You will see that on cars without buffeting too -- it's a general recirculation in the gusset area, and it's quasi steady state. It can be fascinating to watch but also a dramatic indicator of drag/loss (since any flow that isn't going straight back is a telltale of parasitic drag).Check this out too....
We had some heavy rain here yesterday so we took a moment to use the rain to show why the Buffeting happens traveling at a cool 65mph in a straight line.
Take a look at the way the water flows past the mirror. Notice the pooling by the front bottom of the window. And how water gets sucked back towards the front of the car as well as off the bottom of the mirror to the front bottom corner of the window.
The airflow is created a vortex in that area. Which with both windows down should be why it's so unbearable.