BC for fully developed turbulent flow in a pipe

mmd014 · May 21, 2009, 14:47

Dear All,

Please can anyone help me with the equation of the velocity profile for a fully developed turbulent flow in a pipe.

I am working on 3D flow in a pipe and i want to apply fully developed turbulent BC at the inlet. I need the equation for the velocity profile.

Thanks

Dmitry · May 22, 2009, 07:45

Hi!
I suggest another way to solve your problem.
At first stage you can set uniform flow at inlet with turb. parameters such: intensity=5% and viscosity ratio=5 (if you are using two equation model). Get fully converged solution and write velocity and turbulence variables profile at pipe outlet.
At second stage, just set this profile at pipe inlet.

mmd014 · May 22, 2009, 07:50

Thanks Dmitry for your reply. I am going to simulate many velocities of the flow and different mesh sizes. will one case be used for all the above cases.

May 21, 2009, 14:47	BC for fully developed turbulent flow in a pipe	#1
mmd014 New Member Mubarak Join Date: May 2009 Posts: 2 Rep Power: 0	Dear All, Please can anyone help me with the equation of the velocity profile for a fully developed turbulent flow in a pipe. I am working on 3D flow in a pipe and i want to apply fully developed turbulent BC at the inlet. I need the equation for the velocity profile. Thanks

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May 22, 2009, 07:45		#2
Dmitry New Member Dmitry Join Date: Mar 2009 Posts: 7 Rep Power: 17	Hi! I suggest another way to solve your problem. At first stage you can set uniform flow at inlet with turb. parameters such: intensity=5% and viscosity ratio=5 (if you are using two equation model). Get fully converged solution and write velocity and turbulence variables profile at pipe outlet. At second stage, just set this profile at pipe inlet.

May 22, 2009, 07:50		#3
mmd014 New Member Mubarak Join Date: May 2009 Posts: 2 Rep Power: 0	Thanks Dmitry for your reply. I am going to simulate many velocities of the flow and different mesh sizes. will one case be used for all the above cases.