Velocity fluctuations are widely used to identify the behavior of developing turbulent flows. The pressure on the other hand, which is strongly coupled with the gradient of the mean velocity and fluctuations, is less explored. In this study, we report the results of wall pressure measurements for the development of pipe flow at high Reynolds numbers along the axial direction. It is found that the pressure fluctuations increase exponentially along the pipe with a self-similarity scaling. The exponential growth of the pressure fluctuations along the pipe saturates after reaching a critical position around 50 diameters from the inlet. It qualitatively agrees with the critical position usually adopted for fully developed turbulence, which was obtained from earlier velocity fluctuations at various locations along the pipe centerline. Results also show that the exponential growth of the pressure fluctuations is weakly affected by the presence of ring obstacles placed close to the pipe inlet. Finally, it is found that the pressure fluctuations decrease as a function of Reynolds number, contrary to the boundary layer flow.
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August 2018
Research-Article
Wall Pressure in Developing Turbulent Pipe Flows
Kamal Selvam,
Kamal Selvam
Laboratoire Ondes et Milieux Complexes,
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
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Emir Öngüner,
Emir Öngüner
Department of Aerodynamic and
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
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Jorge Peixinho,
Jorge Peixinho
Laboratoire Ondes et Milieux Complexes,
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
e-mail: jorge.peixinho@univ-lehavre.fr
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
e-mail: jorge.peixinho@univ-lehavre.fr
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El-Sayed Zanoun,
El-Sayed Zanoun
Department of Aerodynamics and
Fluid Mechanics,
BTU Cottbus–Senftenber,
Cottbus 03046, Germany;
Fluid Mechanics,
BTU Cottbus–Senftenber,
Cottbus 03046, Germany;
Benha Faculty of Engineering,
Benha University,
Benha 13512, Egypt
Benha University,
Benha 13512, Egypt
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Christoph Egbers
Christoph Egbers
Department of Aerodynamics and
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
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Kamal Selvam
Laboratoire Ondes et Milieux Complexes,
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
Emir Öngüner
Department of Aerodynamic and
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
Jorge Peixinho
Laboratoire Ondes et Milieux Complexes,
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
e-mail: jorge.peixinho@univ-lehavre.fr
CNRS & Université Le Havre Normandie,
Le Havre 76600, France
e-mail: jorge.peixinho@univ-lehavre.fr
El-Sayed Zanoun
Department of Aerodynamics and
Fluid Mechanics,
BTU Cottbus–Senftenber,
Cottbus 03046, Germany;
Fluid Mechanics,
BTU Cottbus–Senftenber,
Cottbus 03046, Germany;
Benha Faculty of Engineering,
Benha University,
Benha 13512, Egypt
Benha University,
Benha 13512, Egypt
Christoph Egbers
Department of Aerodynamics and
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
Fluid Mechanics,
BTU Cottbus–Senftenberg,
Cottbus 03046, Germany
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received August 21, 2017; final manuscript received December 15, 2017; published online March 29, 2018. Assoc. Editor: Sergio Pirozzoli.
J. Fluids Eng. Aug 2018, 140(8): 081203 (7 pages)
Published Online: March 29, 2018
Article history
Received:
August 21, 2017
Revised:
December 15, 2017
Citation
Selvam, K., Öngüner, E., Peixinho, J., Zanoun, E., and Egbers, C. (March 29, 2018). "Wall Pressure in Developing Turbulent Pipe Flows." ASME. J. Fluids Eng. August 2018; 140(8): 081203. https://doi.org/10.1115/1.4039294
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