air flow direction

New electronic climate controls allowing control over air flow direction, but no more ambient temp gauge.

Tufting can be considered a technique for flow visualization, used in aeronautics flight testing to study air flow direction, strength, and boundary layer properties.

Additional downforce comes from the rake (or angle) of the vehicles' body, which directs the underside air up and creates a downward force, and increases the pressure on top of the car because the air flow direction comes closer to perpendicular to the surface.