What is the Belanger equation?
To calculate the free-surface profiles of gradually varied open. channel flows, Bélanger 1828 developed the backwater equation. with the following basic assumptions: 1 a steady flow; 2 a. one-dimensional flow motion; 3 a gradual variation of the wet-
How do you calculate the length of a hydraulic jump?
It is defined as the length between the two sections where one section is taken before the hydraulic jump and the second section is taken after the hydraulic jump. For a rectangular channel, from an experiment, length of hydraulic jump is found to be 5 to 7 times that of the height of the hydraulic jump.
How do you calculate head loss in a hydraulic jump?
There will always be frictional head loss across a hydraulic jump, due to the turbulence in the jump. That frictional head loss, hL, can be calculated from the equation: hL = y1 + V12/2g – (y2 + V22/2g).
What is Froude number in fluid mechanics?
Froude number (Fr), in hydrology and fluid mechanics, dimensionless quantity used to indicate the influence of gravity on fluid motion.
How is Froude number calculated?
It is generally expressed as Fr = v/(gd)1/2, in which d is depth of flow, g is the gravitational acceleration (equal to the specific weight of the water divided by its density, in fluid mechanics), v is the celerity of a small surface (or gravity) wave, and Fr is the Froude number.
What is efficiency of hydraulic jump?
A more rational definition of the efficiency of hydraulic jump on a horizontal floor in a rectangular channel is given by the ratio of the energy actually dissipated in the jump to that required to be dissipated.
How do we produce equations describing the jump?
4. How do we produce equations describing the jump? Explanation: In a hydraulic jump, the equations are produced by conservation of the momentum. It is mainly used to apply in equations that have unknown energy losses.
When Froude number is between 1.7 and 2.5 the type of hydraulic jump is?
weak jump
Based on the Froude number hydraulic jump is classified as: If the Fr is in between 1.0 to 1.7, then it is known as undular jump. If the Fr is between 1.7 to 2.5, then it is known as a weak jump.
How do you calculate Froude number?
How do you calculate Froude number in a pipe?
How to calculate Froude number?
- Step 1: Enter the area of cross-section.
- Step 2: Use the width of the channel to estimate the hydraulic depth.
- Step 3: Input the flow velocity.
- Step 4: The calculator returns the Froude number.
What is Froude number in mixing?
The Froude number is the ratio of inertial forces to gravitational forces. In mixing, it can be used to describe vortex depth or wave height on the liquid surface.