Volumetric flow rate

Volume of fluid which passes per unit time Volume flow rateCommon symbolsQ, V ˙ {\displaystyle {\dot {V}}} SI unitm3/sDimension L 3 T − 1 {\displaystyle {\mathsf {L}}^{3}{\mathsf {T}}^{-1}} In physics and engineering, in particular fluid dynamics, the volumetric flow rate (also known as volume flow rate, or volume velocity) is the volume of fluid which passes per unit time; usually it is represented by the symbol Q (sometimes V ˙ {\displaystyle {\dot {V}}} ). Its SI unit is cubic metres per second (m3/s). It contrasts with mass flow rate, which is the other main type of fluid flow rate. In most contexts a mention of "rate of fluid flow" is likely to refer to the volumetric rate. In hydrometry, the volumetric flow rate is known as discharge. The volumetric flow rate across a unit area is called volumetric flux, as defined by Darcy's law and represented by the symbol q. Conversely, the integration of a volumetric flux over a given area gives the volumetric flow rate. Units The SI unit is cubic metres per second (m3/s). Another unit used is standard cubic centimetres per minute (SCCM). In US customary units and imperial units, volumetric flow rate is often expressed as cubic feet