Voolukiirusega

Voolukiirusega is a term used in Estonian to describe the speed at which a fluid moves, expressed using the instrumental case form of voolukiirus (flow velocity). It is commonly found in scientific and engineering texts to specify the velocity of flow in various media, such as water, air, or blood, and in contexts involving transport, mixing, or advection.

Etymology and form: The word combines vool (flow) and kiirus (speed), with the instrumental suffix -uga, producing voolukiirusega. This form is used to indicate the manner or condition of movement and is typically followed by a numerical value and unit, for example voolukiirusega 1,5 m/s.

Usage: In hydrology and civil engineering, voolukiirusega specifies the velocity of a fluid in rivers, canals, pipes, or channels. In physiology or medical imaging contexts, it can describe the velocity of blood flow in vessels. The expression is also encountered in meteorology and ventilation engineering to denote air flow speed.

Measurement and units: The standard unit is metres per second (m/s). Values depend on context and can range from small fractions in slow-flowing streams or capillaries to larger speeds in fast currents or ducts. Reporting voolukiirusega is typically accompanied by exact measurements, dates, and conditions of measurement.

See also: voolukiirus, vooluhulk, advektioon, fluid dynamics, hydrology.

Notes: Voolukiirusega denotes the velocity of flow in a given situation and should be distinguished from voolukiirus as a general concept of flow speed independent of context.

Examples: Vesi liikus voolukiirusega 1,5 m/s. Vereringes toimunud mõõtmisel voolukiirusega 0,25 m/s tuvastati märkimisväärne muutus.