...Prasun Dutta; Himadri Chattopadhyay; Nityananda Nandi This paper deals with the modeling of turbulent flow through a 90 deg pipe bend using an unsteady Reynolds-averaged Navier–Stokes (U-RANS) approach where k– ε model is used for turbulence closure. While limitations in solving complex flows...

... to the diffusivity of the turbulent flow. The present velocity profile is estimated to vary with power law as u / u jet = ( 1 − z / h ) 1 / 20 . The generated velocity profile for the present experiment is compared with Sun and Ewing [ 20 ] for top hat and fully developed cases...

...Majid Bizhani; Ergun Kuru An experimental program was conducted to investigate turbulent flow of water over the stationary sand bed deposited in horizontal annuli. A large-scale horizontal flow loop equipped with the state-of-the-art particle image velocimetry (PIV) system has been used...

... by 15%, which mainly resulted from a larger gas heating by the surface due to turbulent heat exchange in the jet impact zone. atmospheric pressure PECVD dielectric barrier discharge FEA turbulent flow fluid dynamics With the hypothesis that jet geometry similarly affects heat and mass...

... manuscript received August 3, 2012; published online November 20, 2012. Assoc. Editor: Frank C. Visser. 11 03 2012 03 08 2012 Turbulent flow in d-type corrugated pipes of various aspect ratios has been numerically investigated in terms of flow pattern and friction factor, for Reynolds...

... particle image velocimetry (PIV) flow-induced vibration (FIV) turbulent flow short elbow frequency analysis Velocity fluctuation PSD profiles at point E in the shear flow region ( x / D  = 0.3, y / D  = 0.2). ( a ) Velocity fluctuation in the y direction. ( b ) Velocity fluctuation...

...Zhipeng Duan; M. M. Yovanovich; Y. S. Muzychka The objective of this paper is to furnish the engineer with a simple and convenient means of estimating frictional pressure drop in ducts and the original physical behavior can be clearly reflected. Fully developed turbulent flow frictional pressure...

...X. W. Wang; Y. Zhou; W. O. Wong The turbulent flow within a cylinder‐on‐cone cyclone is highly three‐dimensional and our knowledge of this flow has yet to be improved. This work aims to improve our understanding of the flow structure, with special attention to the swirl number effect. The three...

...Amitesh Kumar; Manab Kumar Das The study of a two-dimensional, steady, incompressible, turbulent flow of a dual jet consisting of a wall jet and an offset jet has been simulated numerically. The standard high Reynolds number two-equation k - ɛ model is used as the turbulence model. The Reynolds...

... 10 03 2011 10 03 2011 cavitation flow simulation marine systems multiphase flow nonlinear dynamical systems propellers turbulence marine propeller computational fluid dynamics nonlinear turbulence model turbulent flow cavitation multiphase flow Marine propeller...

...Henrique Stel; Rigoberto E. M. Morales; Admilson T. Franco; Silvio L. M. Junqueira; Raul H. Erthal; Marcelo A. L. Gonçalves This article describes a numerical and experimental investigation of turbulent flow in pipes with periodic “d-type” corrugations. Four geometric configurations of d-type...

... , W. D. Morris , ed., Wiley , New York . Itoh , M. , Yamada , Y. , Imao , S. , and Gonda , M. , 1992 , “ Experiments on Turbulent Flow Due to an Enclosed Rotating Disk ,” Exp. Therm. Fluid Sci. 0894-1777 , 5 ( 3 ), pp. 359 – 368 . 10.1016/0894-1777(92)90081-F...

...David Hullender; Robert Woods; Yi-Wei Huang In general, the computation of single phase subsonic mass velocity of gas flowing through a pipe requires a computerized iterative analysis. The equations for the friction factor for laminar and turbulent flow are used to obtain explicit equations...

...A. Al-Salaymeh; O. A. Bayoumi Tripping devices are usually installed at the entrance of laboratory-scale pipe test sections to obtain a fully developed turbulent flow sooner. The tripping of laminar flow to induce turbulence can be carried out in different ways, such as using cylindrical wires...

...G. F. K. Tay; D. C. S. Kuhn; M. F. Tachie This paper reports an experimental investigation of the effects of wall roughness and favorable pressure gradient on low Reynolds number turbulent flow in a two-dimensional asymmetric converging channel. Flow convergence was produced by means of ramps...

...Seyed Mohammad Hosseini; Kazuhisa Yuki; Hidetoshi Hashizume T-junction is one of the familiar components in the cooling system of power plants with enormous capability of high-cycle thermal fatigue. This research investigates the structure and mixing mechanism of turbulent flow in a T-junction area...

... number Re is replaced by the roughness Reynolds number Re ϕ . This universality is very well supported by the extensive rough pipe data of Sletfjerding and Gudmundsson, Shockling’s (2005, “Turbulence Flow in Rough Pipe,” MS thesis, Princeton University) machined honed pipe surface roughness data...

... at the same friction velocity. Next, the results are compared in order to characterize the effect of the additive on the turbulent flow. Comparison between the adopted models in this work with the experimental data of 1 ∕ f . ϕ (ppm) Experimental Constant...

... of the absolute spatial resolution of each point was estimated to be within ±0.25 mm. The output from a hot-wire sensor is a time varying signal typically representing a velocity component. For a turbulent flow the anemometer signal will be of a random nature. When using digital data analysis, the continuous...