# Hydraulic jump

1. Apr 5, 2017

### fonseh

1. The problem statement, all variables and given/known data
http://www.brighthubengineering.com...nnel-flow-basics-hydraulic-jump-calculations/

In th earlier part of this notes , i was told that the The hydraulic jump is an abrupt transition to subcritical from supercritical flow.

but , in the diagram , we can see that the hydraulic jump occur when the water from the supercritical enter the subcritical region...
2. Relevant equations

3. The attempt at a solution
which is correct ? I think the second part is correct because when the hydralic jump occur , it's usually when the high speed velocity water enter the slower one . In the region of hydraulic jump , the velocity of the subcritical region is lower .

2. Apr 5, 2017

### CivilSigma

Hydraulic jump occurs from super to sub critical flow.

3. Apr 5, 2017

### fonseh

So , the statement that The hydraulic jump is an abrupt transition to subcritical from supercritical flow is wrong ?

4. Apr 5, 2017

Yes.