What type of flow is defined as a flow in which the velocity of the fluid at a fixed point does not change over time?

Steady flow is characterized by the condition where the velocity of the fluid at a specific point remains constant over time. This means that the flow parameters, such as velocity, pressure, and density, do not change as time progresses. In practical terms, for a flow to be considered steady, at any given location within the fluid, the velocity remains the same no matter when it is measured.

This concept is essential in various applications in hydraulics and fluid dynamics, as it simplifies the analysis and modeling of fluid behavior. For instance, understanding steady flow allows engineers to design systems like pipelines and open channels, where consistent flow characteristics are crucial for efficient operation.

Other types of flow, such as turbulent flow, involve chaotic changes in velocity and pressure, where the flow is rapidly fluctuating and unpredictable. Uniform flow refers to a situation where the velocity is constant along a flow path, but it might still change over time if the flow is not steady. Non-steady flow indicates that the flow parameters can change with time, which is opposite to the definition of steady flow.