... projected on the channel frontal plane were obtained with particle image velocimetry (PIV) for the dispersed phase of bubbly flows. Stratified pipe flow pattern results in PSHE channel segregated flow. The thermal analysis of segregated flow patterns occurring in the hot and cold sides of a PSHE reveals...

... and 125 mm, i.e., radius ratio ( α = R i / e ) of 0.39 and 0.80, respectively, with the aim of improving the understanding of flows in annular ducts. Particle image velocimetry (PIV) was applied to obtain instantaneous and averaged velocity measurements of the flow field. A charge-coupled device camera...

...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...

... 2017 12 07 2018 Electro-hydrodynamic flows PIV Pumps Turbomachines A strong electric field applied between the two electrodes initiates a corona discharge which results in ionization of gas molecules. The gaseous ion flux along the electric field lines induces ionic wind, also...

... Waves ,” Eur. J. Mech.-B/Fluids , (in Press). 10.1016/j.euromechflu.2018.04.003 [13] Zhu , W. , Van Hout , R. , and Katz , J. , 2007 , “ PIV Measurements in the Atmospheric Boundary Layer Within and Above a Mature Corn Canopy—Part II: Quadrant-Hole Analysis ,” J. Atmospheric Sci...

... configuration. Particle image velocimetry (PIV) measurements of the constructive interference cases show strong synchronized vorticity shedding in all cavities. Each cavity contribution to the total aeroacoustic source is then examined by means of Howe's analogy, and the percentage contribution of each cavity...

... in the J OURNAL OF F LUIDS E NGINEERING . Manuscript received January 18, 2018; final manuscript received May 4, 2018; published online June 26, 2018. Assoc. Editor: Riccardo Mereu. 18 01 2018 04 05 2018 Computational fluid dynamics Jets Laser diagnostics Mixing PIV RANS...

... is the greatest. As the jets spread, the thickness of the shear layer increases and the velocity becomes well distributed across it, which leads to a lower mean shear and vorticity. The mean vorticity contours, which show the overall rotational behavior of the vortical structures obtained from all the PIV...

...Adam Ritcey; Joseph R. McDermid; Samir Ziada The maximum impingement plate skin friction and flow field is measured for an acoustically forced planar impinging gas jet using oil film interferometry (OFI) and particle image velocimetry (PIV), respectively. The study is performed at a jet Reynolds...

... field inside the wafer rinsing tank with this original lifter orientation setup was studied and compared through numerical simulation and flow visualization using particle image velocimetry (PIV) method, and a strong agreement was found between them in terms of velocity calculation. A new lifter...

... 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...

... breakup, and spray formation. These are challenging problems to solve with computational fluid dynamics (CFD) [ 7 ]. Computational fluid dynamics Direct numerical simulation Free surface flows Liquid-solid Multiphase flows Naval hydrodynamics PIV Unsteady flows Waves 21 10 2017...

...; published online March 29, 2018. Assoc. Editor: Elias Balaras. 02 07 2017 15 02 2018 Boundary layers Experimental techniques Hydrodynamics PIV Turbulence Typical commercial recirculating water tunnels achieve a momentum thickness based Reynolds number (Re θ ) on the order...

.... This study presents a new method for determining inlet boundary conditions of LES using particle image velocimetry (PIV). LES shows sensitivity to inlet boundary conditions in the developing region, and this effect can even extend into the fully developed region of the flow. Two kinds of boundary conditions...

...Paulius Vilkinis; Nerijus Pedišius; Mantas Valantinavičius Flow over a transitional-type cavity in microchannels is studied using a microparticle image velocimetry system ( μ PIV) and commercially available computational fluid dynamics (CFD) software in laminar, transitional, and turbulent flow...

... is the deployment of high-lift devices, like leading-edge slats. The unsteady turbulent flow over a leading-edge slat is studied herein. In particular, particle image velocimetry (PIV) measurements were performed on a scale-model wing equipped with a leading-edge slat in the H.J. Irving–J.C.C. Picot Wind Tunnel...

... the nozzle to the surface of a cylinder. The particle image velocimetry (PIV) method was used to measure the mean streamwise velocity profiles, which were normalized by the maximum velocity along the centerline of the impinging jet onto the cylinder. After the impingement of the circular jet, a 3D curved...

... control postponed the stall onset by 25 deg and produced a 103% gain in lift without any saturation signs at a control speed ratio of U b /U = 6. Particle image velocimetry (PIV) measurements confirmed the effectiveness of the moving-wall control strategy on the upper surface flow reattachment. Moreover...

... levels in the draft tube are considered, two of them featuring a stable flow configuration and one of them displaying a self-excited oscillation of the cavitation vortex rope. The velocity field is measured by two-dimensional (2D) particle image velocimetry (PIV) and systematically compared...

...Hassan Iftekhar; Martin Agelin-Chaab This study reports the results of turbulent flows forward facing steps (FFS) in pressure gradients using a particle image velocimetry (PIV) technique to obtain data up to 68 step heights downstream. The contours of two-point velocity correlations indicate...