boundary layer thickness for pipe flow

January 2, 2008, 23:57

Hi,

is there any empirical relation for boundary layer thickness for a fully developed turbulent pipe flow

regards Ranjith

January 3, 2008, 09:01

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

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

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

Nick R · September 13, 2015, 23:29

"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.

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, 23:29		#5
Nick R Senior Member Nick Join Date: Nov 2010 Posts: 126 Rep Power: 16	"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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