The phrase "air diffusion" is correct and usable in written English.
It can be used in contexts related to the movement or spread of air, often in scientific or technical discussions about ventilation, meteorology, or environmental studies.
Example: "The study focused on air diffusion patterns in urban areas to understand how pollutants disperse."
Alternatives: "air distribution" or "air spread".
Good air diffusion performances were achieved with four types of diffusers.
Because water vapor has a lower molecular weight than moist air, diffusion of water vapor is faster than heat and the centerline becomes supersaturated37.
The experimental results indicate that the exhaust location and the supply airflow rate can affect the air diffusion performance.
The electrolytic cell contained a boron-doped diamond (BDD) anode and an air diffusion cathode.
Concretely, both emulsions and liposomes were tested in six enrichment series resulting from the combination of three different airflows and two air diffusion systems.
The local air speeds and temperatures at 4 different levels of 8 positions were monitored for the calculation of air diffusion performance index (ADPI) and draft risk.
"Soot Formation in Ethylene-Air Diffusion Flames," Leaders in Mechanical Engineering Lecture Series, University of Maryland, College Park, Maryland, April 2005.
A few blocks north, at the Delos on East 11th Street, a luxury "wellness" condominium conversion of a 19th-century building, the same scent technology (what's known as cold-air diffusion, pumped through the ductwork) is in place for custom fragrances to perfume the apartments of Deepak Chopra, Leonardo DiCaprio and others who have bought there.
Laser-induced fluorescence is used to determine quantitative hydroxyl concentration profiles in opposed CH4/N2-air diffusion flames with and without suppressants.
With the addition of coal dust, the radiative fraction of premixed methane-air flames become comparable to that of methane-air diffusion flames.
Acoustic pressure response of diluted hydrogen-air diffusion flames is investigated numerically by adopting a fully unsteady analysis of flame structures in a counterflow.
