What does the word 'Jet' mean in fluid mechanics?

[math04]

What does it mean the word 'Jet' in fluid mechanics, special when it depends on the free surface?!

 

[berkeman]

What does it mean the word 'Jet' in fluid mechanics, special when it depends on the free surface?!

https://en.wikipedia.org/wiki/Jet_(fluid)

https://acikders.ankara.edu.tr/plug...ontent/1/WEEK 9 OF AQS110 FLUID MECHANICS.pdf

What references have you been reading about your question?

 

[math04]

https://en.wikipedia.org/wiki/Jet_(fluid)

https://acikders.ankara.edu.tr/pluginfile.php/16641/mod_resource/content/1/WEEK 9 OF AQS110 FLUID MECHANICS.pdf

What references have you been reading about your question?

I have found it in pdf as follows:

''''' The principal applications of the free streamline concept are to jet ... '''

 

[berkeman]

I have found it in pdf as follows:

''''' The principal applications of the free streamline concept are to jet ... '''

Can you post a link?