👉 The rate fluid, also known as the volumetric flow rate or discharge, is a measure of the volume of fluid passing through a given cross-sectional area per unit time. It's typically expressed in cubic meters per second (m³/s) or gallons per minute (GPM). This parameter is crucial in fluid mechanics as it quantifies how quickly a liquid or gas moves through a pipe, channel, or any other conduit, and is essential for designing and analyzing fluid systems in engineering applications, from water supply networks to hydraulic machinery.