scholarly journals Flow Pattern and Frictional Losses in Pulsating Pipe Flow : Part 3, General Representation of Turbulent Flow Pattern

1980 ◽  
Vol 23 (186) ◽  
pp. 2029-2036 ◽  
Author(s):  
Munekazu OHMI ◽  
Manabu IGUCHI
Keyword(s):  
Turbulent Flow ◽  
Flow Pattern ◽  
Pipe Flow ◽  
General Representation ◽  
Frictional Losses ◽  
Flow Part

scholarly journals Flow Pattern and Frictional Losses in Pulsating Pipe Flow : Part l, Effect of Pulsating Frequency on the Turbulent Flow Pattern

1980 ◽  
Vol 23 (186) ◽  
pp. 2013-2020 ◽  
Author(s):  
Munekazu OHMI ◽  
Manabu IGUCHI ◽  
Tateo USUI ◽  
Haruyasu MINAMI
Keyword(s):  
Turbulent Flow ◽  
Flow Pattern ◽  
Pipe Flow ◽  
Frictional Losses ◽  
Flow Part

Turbulent Flow in Axially Rotating Pipes

1980 ◽  
Vol 102 (1) ◽  
pp. 97-103 ◽  
Author(s):  
Mitsukiyo Murakami ◽  
Kouji Kikuyama
Keyword(s):  
Velocity Profile ◽  
Turbulent Flow ◽  
Flow Pattern ◽  
Axial Velocity ◽  
Hydraulic Loss ◽  
Pressure Distributions ◽  
Axial Velocity Profile ◽  
Fully Developed Turbulent Flow ◽  
Smooth Pipe ◽  
Pipe Rotation

Experimental results concerning the flow pattern and hydraulic resistance in a rotating pipe are described. A fully developed turbulent flow was introduced into a long smooth pipe rotating about its axis, and changes of the flow pattern, together with hydraulic loss within the pipe, were examined by measuring the velocity and pressure distributions across sections at various distance from the pipe entrance. Increase of pipe rotation continuously reduces the hydraulic loss and gradually changes the axial velocity profile from a turbulent type to a laminar one. Governing factors for these changes are discussed.

Anisotropy Invariants of Reynolds Stress Tensor in a Duct Flow and Turbulent Boundary Layer

1998 ◽  
Vol 120 (2) ◽  
pp. 280-284 ◽  
Author(s):  
A. Mazouz ◽  
L. Labraga ◽  
C. Tournier
Keyword(s):  
Surface Roughness ◽  
Turbulent Flow ◽  
Stress Tensor ◽  
Reynolds Stress ◽  
Pipe Flow ◽  
Duct Flow ◽  
Reynolds Stress Tensor ◽  
Entire Thickness ◽  
Anisotropy Tensor ◽  
Flow Turbulence

The present study shows that the Reynolds stress anisotropy tensor for turbulent flow depends both on the nature of the surface and the boundary conditions of the flow. Contrary to the case of turbulent boundary layers with k-type surface roughness, the measured anisotropy invariants of the Reynolds stress tensor over a series of spanwise square bars separated by rectangular cavities (k-type) in duct flows show that roughness increases the anisotropy. There is a similarity between the effect of roughness on channel flow turbulence and that on pipe flow turbulence. The present data show that the effect of introducing a surface roughness significantly perturbs the entire thickness of the turbulent flow.

Sign in / Sign up

Export Citation Format

Share Document