tiivistyskerrointa

Tiivistyskerroin is a term used in Finnish scientific language to denote a dimensionless coefficient that describes the degree of compression or densification of a system relative to a reference or ideal state. The most common usage is in thermodynamics and gas theory, where tiivistyskerroin refers to the compressibility factor, a measure of how real substances deviate from idealized behavior during compression.

In thermodynamics, the compressibility factor Z is defined as Z = P V / (n R T), where P is pressure, V is volume, n is the amount of substance, R is the gas constant, and T is temperature. When Z equals 1, the substance behaves as an ideal gas. Values of Z different from 1 indicate departures from ideality caused by molecular interactions and finite molecular size. Z is used in property tables, equations of state, and process calculations to adjust for non-ideal behavior, especially at high pressures or low temperatures.

Beyond gas theory, tiivistyskerroin may appear in other fields with a similar purpose: to quantify the effectiveness or extent of a compression or densification process. In materials science, geotechnical engineering, or related disciplines, the exact definition and formula of tiivistyskerroin can vary by context and author, and it is typically presented as a dimensionless factor describing how much a system has compacted relative to a reference state.

See also: compressibility, compressibility factor, equations of state.