The flow velocity of a fluid effectively describes everything about the motion of a fluid. Many physical properties of a fluid can be expressed mathematically in terms of the flow velocity. Some common examples follow:

Calculate pressure losses, recommended velocities, capacities and more. Recommended max suction flow velocity when pumping boiling fluids. Recommended max flow velocity on the delivery (pressure) side when pumping boiling liquids. Water velocity in a copper tube should not exceed certain limits to avoid erosion.

Flow rate and velocity are related, but quite different, physical quantities. To make the distinction clear, think about the flow rate of a river. The greater the velocity of the water, the greater the flow rate of the river.

流速（flow velocity；current velocity） 液体单位时间内的位移。 质点流速是描述液体质点在某瞬时的运动方向和运动快慢的矢量。 其方向与质点轨迹的切线方向一致。

Flow rate measures the volume of fluid passing a point in a given time (e.g., m³/s, L/min). Velocity measures the speed and direction of fluid movement (e.g., m/s, ft/s). Consider two pipes with the same flow rate but different diameters:

2018年10月31日 · Flow velocity is the distance traveled by a fluid per time i.e. meter/second or feet/minute. Friction along the pipe walls can affect the flow velocity of a fluid. There are two types of velocities that effect pipes namely, minimum velocity or self-cleansing velocity and maximum or non-scouring velocity.

体积流率 [1] （volumetric flow rate，volume flow rate）又称体积速度 [2] （volume velocity），是在流体力学及水力学中的物理量，是指单位时间通过特定表面的流体体积，常用大写字母Q表示。

The fluid velocity in a pipe is a fundamental data to calculate to be able to characterize the flow in a pipe, thanks to the Reynolds number, and size a pipe circuit calculating the pressure drop expected for a certain flow.

Typical fluid flow velocities for common liquids, gases and vapors. Fluid flow and pressure loss in pipe lines. Water and sewer systems. Steel pipes, pvc pipes, copper tubes and more. Recommended max suction flow velocity when pumping boiling fluids.

2024年7月19日 · Flow velocity in fluids is the vector field that provides the velocity of fluids at a certain time and position. Flow velocity is also known as macroscopic velocity. The flow velocity of fluids efficiently defines everything about the fluid's motion. A lot of fluids' physical properties can be expressed in a mathematical manner.