Trykksammenheng

Trykksammenheng (Norwegian for 'pressure relationship') is a term used in physics, engineering and related fields to denote how pressure depends on or relates to other state variables within a system. It is not a single theory, but a way of describing the interdependencies between pressure and properties such as depth, density, temperature, volume, and flow velocity.

Examples include hydrostatics, where pressure increases with depth according to p = p0 + ρ g h; thermodynamics, where gases obey relationships like pV = nRT indicating pressure depends on volume and temperature; and fluid dynamics, where Bernoulli's principle links static pressure to velocity and elevation.

Practical use of the concept includes designing pressure vessels and piping systems, selecting appropriate pressure gauges and safety margins, and modeling subsurface pore pressures in geology and petroleum engineering.

Some contexts distinguish static pressure, dynamic pressure, and total pressure as components of a pressure relationship in a system. The term is most commonly used in Norwegian-language texts and is often translated as 'pressure relationship' or 'pressure context' in English.