spraypatroon

Spraypatroon is a term used to describe how a spray device distributes liquid or other fluid into a pattern when released. It refers to the spatial distribution of droplets, including the shape, density, and coverage of the spray on a target surface. The pattern arises from the interaction of the nozzle design, operating pressure, fluid properties, and the distance and orientation between the nozzle and target.

Nozzle geometry such as orifice size and exit angle, as well as whether the spray is atomized by air or fluid shear, determine whether the pattern is a solid cone, hollow cone, fan, or a straight jet. Fluid viscosity, surface tension, and temperature influence droplet size and evaporation; higher pressure and air assist generally produce finer sprays.

Patterns are characterized by measurable parameters such as spray angle, spray width, and droplet size distribution. Deposition density and uniformity indicate how evenly the target is covered; drift potential describes unwanted transport by air. Methods to evaluate spray patterns include imaging, deposition tests, and droplet-size analysis.

Common applications include industrial coatings and painting, agricultural sprays for crops, cleaning and disinfection fogging, and fire suppression or cooling sprays. In consumer products, spray patterns affect perfume delivery, deodorants, and household cleaners.

Practical control involves selecting an appropriate nozzle, adjusting the distance and angle, and regulating pressure and movement to achieve the desired coverage while minimizing drift and waste.