The phrase "air over the surface" is correct and usable in written English.
It can be used in contexts discussing phenomena related to the atmosphere, fluid dynamics, or environmental science.
Example: "The temperature of the air over the surface of the water affects the rate of evaporation."
Alternatives: "atmosphere above the surface" or "air above the surface".
As airspeeds grew, there was a requirement for a very smooth passage of air over the surface, which was achieved in the laminar-flow airfoil, where the camber was farther back than contemporary practice dictated.
The air over the surface of the airfoil is drawn into the airfoil through a slit.
It uses rare earth magnets to connect the miniature skaters to the rods (thus avoiding those unsightly slots in the rink) and blows air over the surface of the rink to keep the puck moving as if it were on ice.
With a tank of still water, the researchers turned on fans to mimic ocean winds, blowing air over the surface of the tank for two hours and carefully monitoring the surface elevation of the water the entire time.
The aeration process is achieved by injecting air over the surfaces of submerged, translating blades.
Counter-intuitively, forcing the boundary layer of air passing over the surface of a ball in flight to flip from smooth, laminar flow to turbulent flow improves the ball's aerodynamics no end.
The device operates on the Bernoulli principle whereby air flow over the surface of an object generates a lift.
In order to increase the efficiency of this process, small sized turbulators have been used on the absorber plate that is breaking the viscous layer/sub-layer of the air flowing over the surface.
Hence, the air over the water surface has been in saturated condition.
Under running conditions, a blower is used to blow air over the finned surface of the cylinder to cool the engine-simulating actual road conditions.
From calculation of the air flow along the tunnel at different conditions, an equation was developed for the velocity distribution of the dragged air over the free surface and the air supplied from the tunnel outlet.
