# boundary layer thickness for pipe flow

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 January 2, 2008, 23:57 boundary layer thickness for pipe flow #1 ranjith Guest   Posts: n/a Hi, is there any empirical relation for boundary layer thickness for a fully developed turbulent pipe flow regards Ranjith

 January 3, 2008, 09:01 Re: boundary layer thickness for pipe flow #2 Jia Guest   Posts: n/a There is a exact solution of the fully developed pipe flow(Poiseuille Flow), u=1/(4mu)*dp/dx*(r^2-a^2), where mu is dynamics viscosity, dp/dx is the pressure gradient and a is the radius of the pipe. May this help. Jia

 January 3, 2008, 09:02 Re: boundary layer thickness for pipe flow #3 Jia Guest   Posts: n/a Hi,Ranjith! There is a exact solution of the fully developed pipe flow(Poiseuille Flow), u=1/(4mu)*dp/dx*(r^2-a^2), where mu is dynamics viscosity, dp/dx is the pressure gradient and a is the radius of the pipe. May this help. Jia

 January 4, 2008, 23:58 Re: boundary layer thickness for pipe flow #4 ranjith Guest   Posts: n/a thanks jia....I suppose poiseuille's relation applies to fully developed laminar flow while I am interested in fully developed turbulent flow. I have got a relation for turbulent flow called 'seventh root law' and I hope that will give me the boundary layer thickness ranjith

 September 13, 2015, 22:29 #5 Senior Member   Nick Join Date: Nov 2010 Posts: 126 Rep Power: 8 "boundary layer thickness for a fully developed turbulent pipe flow" ? In the fully-developed region, the boundary layers of both sides of the pipe have merged and as such the thickness is the entire diameter of the pipe. Onurozcan, haitham osman and MelroseBing like this.

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