...Chitrangini Sahu; T. I. Eldho; B. S. Mazumder This study investigates the turbulent flow properties experimentally in the vicinity of two side-by-side circular cylinders, along with the influence of the third cylinder of the same dimension placed in the upstream and successively in the downstream...

...Anurag Sharma; Bimlesh Kumar This present study analyzes the Reynolds stress anisotropy in the nonuniform sediment beds under the condition of no seepage and downward seepage flow. The results show the estimation of the deviation measure from the isotropic turbulence in view of Reynolds stress...

... without a noncondensation gas. cavitation noncondensation gas thermodynamic effect homogeneous model turbulence Cavitation is known as a primary problem in hydraulic machines and systems. The cavitation occurring whenever the local pressure drops below the saturated vapor pressure can...

...M. Coussirat; F. Moll Cavitation in pressure injectors/atomizers affects the liquid/spray jet behavior at its outlet. The type of atomization induced by cavitation allows developing efficient devices if this cavitation state is controlled. Cavitating flow is related to turbulent and multiphase...

... is to analyze the turbulent characteristics around specially designed three-dimensional (3D) breakwaters, and its impact on sediment deposition under coastal wave actions. Both computational fluid dynamics (CFD) simulations and experimental measurements were conducted. In order to validate the CFD models used...

... of vehicles, locomotion strategies, and propulsion of systems, among others. flat plate plate oscillation rotation turbulence 01 07 2019 11 11 2019 04 02 2020 Copyright © 2020 by ASME 2020 0098-2202/2020/142(5)/051301/8/ $25.00 ...

... ρ = fluid density Φ = flow rate coefficient Ψ = head coefficient ω = angular speed Subscripts eff = efficiency h = hydraulic lam = laminar p = power tur = turbulent w = rotational speed References [1...

.... gas-liquid mixing multiphase flows turbulence duct channel and pipe flows Natural resource agencies are evaluating the use of locks and dams to prevent the spread of aquatic invasive species (AIS), particularly bigheaded carps (silver Hypophthalmichthys molitrix and bighead carp H...

...David A. Hullender A new approach for obtaining a normalized closed-form frequency domain analytical model for the non-Newtonian shear thinning effects on the pressure and shear stress transients in a pretransient turbulent flow of fluids in smooth circular lines is formulated. The Oldroyd-B model...

...Varun Chitta; Tausif Jamal; D. Keith Walters This paper investigates the ability of computational fluid dynamics (CFD) simulations to accurately predict the turbulent flow separating from a three-dimensional (3D) axisymmetric hill using a recently developed four-equation eddy-viscosity model (EVM...

...-dimensional computational fluid dynamics (CFD) study is carried out. Shear stress transport (SST) turbulence and Rayleigh–Plesset cavitation models are used in simulations. Inlet blade angles for both hub and shroud are changed and pump performance (head-discharge) and cavitation (head-inlet pressure) graphs...

... coils using half-rods. Although the rods are wall-bounded, the flow still exhibits the turbulent characteristics and fluctuations from vortex shedding that one would expect from crossflow around a cylinder. The spectral element, computational fluid dynamics (CFD) code Nek5000, is used to capture...

... is 163.93 Hz, and the cavitation shedding frequency at the short side is 306.67 Hz, which is about twice the value of the former. The filtered vorticity transport equation is employed to investigate the cavitation–vortex–turbulence interaction. Results indicate that vortex stretching is the major promoter...

...Kuldeep Singh; José Carlos Páscoa In the present work, a numerical study is carried out to compare the performance of seven turbulence models on a single pitching blade of cycloidal rotor operating in deep dynamic stall regime at moderate Reynolds number. The investigated turbulence models were: (i...

... representations of reality. The twin jet water facility (TJWF) designed and built at the University of Tennessee, Knoxville was created for this purpose. The facility features twin planar-like turbulent free shear jets injecting fluid into a transparent tank to study a variety of flow behavior. The experimental...

... OURNAL OF F LUIDS E NGINEERING . Manuscript received August 18, 2017; final manuscript received May 2, 2018; published online June 13, 2018. Assoc. Editor: Jun Chen. 18 08 2017 02 05 2018 Aerodynamics Computational fluid dynamics Drag Turbulence Turbulence modeling Wakes...

...Seyed Sobhan Aleyasin; Nima Fathi; Mark Francis Tachie; Peter Vorobieff; Mikhail Koupriyanov The aim of this study is to examine the effects of Reynolds number (Re = 6000–20,000) on mean and turbulent quantities as well as turbulent structures in the near and intermediate regions of equilateral...

... the mean flow and the turbulence characteristics. Here, the proper orthogonal decomposition (POD) technique was employed on the velocity measurements obtained using particle image velocimetry (PIV) to quantify the external characteristics of a superheated water jet released into water. This was done...

...Kamal Selvam; Emir Öngüner; Jorge Peixinho; El-Sayed Zanoun; Christoph Egbers 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...

...Pascal Bader; Manuel Pschernig; Wolfgang Sanz; Jakob Woisetschläger; Franz Heitmeir; Walter Meile; Günter Brenn Flow in turbomachines is generally highly turbulent. Nonetheless, boundary layers may exhibit laminar-to-turbulent transition, and relaminarization of the turbulent flow may also occur...