Concus

Concus is a surname that appears in science and academia. It is also the name attached to the Concus–Finn condition, a well-known criterion in capillarity theory describing how liquids behave in corners and wedges formed by solid boundaries. The condition is named for researchers who studied wetting phenomena at sharp angles and has applications in microfluidics, coatings, and the study of porous materials.

In essence, the Concus–Finn criterion predicts whether a liquid will advance into a corner under capillary forces depending on the liquid’s contact angle and the corner geometry. When the liquid’s contact angle is small enough relative to the corner angle, capillary action drives the liquid into the corner; if not, the meniscus remains separated from the corner. The concept helps explain patterns of wetting and is used to design surfaces that control fluid spreading and filling in confined geometries.

Beyond this scientific usage, Concus is encountered as a surname in various regions. People bearing the name have contributed to diverse disciplines, including science and education, though no single figure is universally identified with the term.

See also: Concus–Finn condition.