# what is the fully developed fluid flow?

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 November 9, 2006, 15:21 what is the fully developed fluid flow? #1 charles Guest   Posts: n/a Hi all, I want to know that what are physical characteristics of fully developed fluid flows? or what is the fully developed fluid flow? Regards. charles.

 November 10, 2006, 04:02 Re: what is the fully developed fluid flow? #2 Luke Guest   Posts: n/a Hi charles A fully developed fluid flow through a pipe is one in which the boundary layer extends to the centreline. Hence the maximum velocity of the boundary layer is the same as the centreline velocity of the pipe.

 November 10, 2006, 04:47 Re: what is the fully developed fluid flow? #3 charles Guest   Posts: n/a Hi Luke, If I understood that flow occurs in the narrow canal flow otherwise boundary layer can not extend to the centerline.it is not watched in the wide openning boundary? Thanks for help. Best regards. charles.

 November 10, 2006, 05:04 Re: what is the fully developed fluid flow? #4 Luke Guest   Posts: n/a Fully developed flow is an ideal case and does not occur in reality as a laminar Bl cannot extend to the centreline, it will turn turbulent long before that happens.....

 November 10, 2006, 09:18 Re: what is the fully developed fluid flow? #5 charles Guest   Posts: n/a Thanks Luke. charles.

 November 10, 2006, 15:50 Re: what is the fully developed fluid flow? #6 Bian Guest   Posts: n/a Are you sure about this???? As long as the boundary layer (velocity profile) will not change along flow direction, this flow is called fully developed flow.

 November 12, 2006, 20:47 Re: what is the fully developed fluid flow? #7 Johnny Guest   Posts: n/a I agree with Bian. Fully developed flow was when you have zero gradients in the streamwise direction.

 November 13, 2006, 10:48 Re: what is the fully developed fluid flow? #8 The one Guest   Posts: n/a I would add that zero gradients is for velocity, not for pressure in the streamwise direction.

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