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The chapter delves into the phenomena of hydraulic jump, emphasizing its characteristics as a rapidly varied flow in open channel hydraulics. It discusses the conditions under which hydraulic jumps occur, specifically focusing on the transition from supercritical to subcritical flow, and the associated energy losses. Mathematical formulations derived from principles like momentum and energy conservation are presented, alongside practical insights into the applications and types of hydraulic jumps.
Chapter 2115 sections
The chapter delves into the phenomena of hydraulic jump, emphasizing its characteristics as a rapidly varied flow in open channel hydraulics. It discusses the conditions under which hydraulic jumps occur, specifically focusing on the transition from supercritical to subcritical flow, and the associated energy losses. Mathematical formulations derived from principles like momentum and energy conservation are presented, alongside practical insights into the applications and types of hydraulic jumps.
Hydraulic jumps occur when there is a transition between supercritical and subcritical flow, resulting in rapid changes in water depth.
Three main assumptions guide the analysis of hydraulic jumps: uniform, steady, one-dimensional flow; neglect of wall shear stresses between segments; and hydrostatic pressure forces.
The Froude number at the upstream section must be greater than 1 for a hydraulic jump to occur, indicating that the flow must be supercritical.
A hydraulic jump refers to the phenomenon of sudden change in flow conditions, leading to a rise in water depth in open channel flow caused by a transition from supercritical flow to subcritical flow.
The Froude number is a dimensionless ratio used to determine the flow regime in open channel flow, defined as V/sqrt(g*y), where V is the flow velocity, g is the acceleration due to gravity, and y is the flow depth.
The energy loss in a hydraulic jump occurs due to turbulent mixing and dissipation during the transition from supercritical to subcritical flow, typically expressed in terms of head loss.
Total Questions
2
Estimated Time
4 min
Passing Score
70%
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