...Rafael Ballesteros-Tajadura; José González This paper shows a comparison of the most classic and historical formulations to obtain the friction factor for cylindrical pipes with novel approaches. Although there has been some evolution of the expressions, basically, the ideas and results remain very...

...Irfan Karagoz; Atakan Avci 09 10 2010 22 11 2010 01 02 2011 01 02 2011 friction pipe flow pipes turbulence The discussion made by Tajadura and Gonzales ( 1 ) necessitates the clarification of the comments about our paper ( 2 ). The same notation and comment...

...B. P. M. van Esch Many centrifugal pumps have a suction velocity profile, which is nonuniform, either by design like in double-suction pumps, sump pumps, and in-line pumps, or as a result of an installation close to an upstream disturbance like a pipe bend. This paper presents an experimental study...

... that the injector-supplying pipe dimensions can exert on the frequency and amplitude of the injection-induced pressure oscillations was widely investigated and a physical explanation of cause-effect relationships was found by energetics considerations, starting from experimental tests. A parametric study...

... complex turbulent flows such as cross flows in banks of cylinders and packed beds, and longitudinal flows in channels, pipes, and rod bundles. For generalization, we shall reexamine the extra production terms due to the presence of the porous media, appearing in the transport equations of turbulence...

... higher drag reduction when compared to the welan gum fluids investigated in this study. 26 06 2007 05 02 2008 29 07 2008 drag reduction friction pipe flow pipes polymer solutions rheology Effect of curvature ratio on friction factor of 1.43 kg ∕ m 3 welan...

... 04 2008 hydraulic systems pipe flow pipes swirling flow Securing stable operation is one of the most important issues in hydraulic power generation systems. At part load, a draft tube surge occurs when the frequency of the vortex rope whirl agrees with the resonant frequency...

.... 05 07 2007 08 10 2007 01 04 2008 pipes pistons shock tubes A newly designed double piston-actuated structure ( 1 2 ), which is a variation of the design reported by Oguchi et al. ( 3 ), has been developed for diaphragms that are usually employed to separate the high...

...Eduarda P. F. de Pina; M. S. Carvalho Flow in annular space occurs in drilling operation of oil and gas wells. The correct prediction of the flow of the drilling mud in the annular space between the well wall and the drill pipe is essential to determine the variation in the mud pressure within...

...Peter D. Lysak An important source of vibration and noise in piping systems is the fluctuating wall pressure produced by the turbulent boundary layer. One approach to calculating the wall pressure fluctuations is to use a stochastic model based on the Poisson pressure equation. If the model...