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Keyword: PIV
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Journal Articles
Article Type: Research-Article
J. Fluids Eng. June 2019, 141(6): 061102.
Paper No: FE-18-1352
Published Online: December 10, 2018
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. May 2019, 141(5): 051102.
Paper No: FE-16-1844
Published Online: November 8, 2018
...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 for the...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2019, 141(1): 011206.
Paper No: FE-17-1422
Published Online: August 16, 2018
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. February 2019, 141(2): 021201.
Paper No: FE-17-1598
Published Online: July 10, 2018
... . Manuscript received September 19, 2017; final manuscript received June 6, 2018; published online July 10, 2018. Assoc. Editor: Jun Chen. 19 09 2017 06 06 2018 environmental flows PIV Wakes Conditional sampling of Reynolds shear stress (RSS) has a long history in the study of...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2019, 141(1): 011102.
Paper No: FE-18-1019
Published Online: June 27, 2018
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121108.
Paper No: FE-18-1031
Published Online: June 26, 2018
... stress transport turbulence models. Their results agreed well with the provided LDV and PIV data for profiles in the converging and merging regions of the flow for the velocity and Reynolds stress profiles. The current work discussed builds on this effort by extensively investigating steady RANS in the...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. November 2018, 140(11): 111202.
Paper No: FE-18-1007
Published Online: May 18, 2018
... NGINEERING . Manuscript received January 3, 2018; final manuscript received April 12, 2018; published online May 18, 2018. Assoc. Editor: Devesh Ranjan. 03 01 2018 12 04 2018 Jets Mixing PIV Turbulence Vortices Turbulent jets have diverse applications in mechanical and...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. September 2018, 140(9): 091201.
Paper No: FE-17-1632
Published Online: April 19, 2018
...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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. August 2018, 140(8): 081107.
Paper No: FE-17-1545
Published Online: April 10, 2018
... 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 at...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. August 2018, 140(8): 081106.
Paper No: FE-17-1493
Published Online: April 10, 2018
... the flow 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. August 2018, 140(8): 081102.
Paper No: FE-17-1404
Published Online: March 29, 2018
...; 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. August 2018, 140(8): 081205.
Paper No: FE-17-1678
Published Online: March 29, 2018
... online March 29, 2018. Assoc. Editor: Shawn Aram. 21 10 2017 05 02 2018 Computational fluid dynamics Direct numerical simulation Free surface flows Liquid-solid Multiphase flows Naval hydrodynamics PIV Unsteady flows Waves Wave-spray events are recognized as dangerous...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. July 2018, 140(7): 071401.
Paper No: FE-17-1051
Published Online: March 16, 2018
.... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. July 2018, 140(7): 071203.
Paper No: FE-17-1617
Published Online: March 13, 2018
...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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. April 2018, 140(4): 041105.
Paper No: FE-17-1354
Published Online: December 4, 2017
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. April 2018, 140(4): 041201.
Paper No: FE-17-1377
Published Online: November 16, 2017
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2018, 140(1): 011104.
Paper No: FE-17-1171
Published Online: September 20, 2017
... 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...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2017, 139(12): 121103.
Paper No: FE-17-1124
Published Online: September 1, 2017
... 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 to the...
Journal Articles
Article Type: Technical Briefs
J. Fluids Eng. November 2017, 139(11): 114501.
Paper No: FE-16-1578
Published Online: July 21, 2017
...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 that...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. October 2017, 139(10): 101206.
Paper No: FE-17-1087
Published Online: July 21, 2017
... with aspect ratios of 2 and 3. For each jet, detailed velocity measurements were made using a particle image velocimetry (PIV) system at Reynolds numbers of 2500 and 17,000. The results showed that at both Reynolds numbers, the elliptic jets had relatively higher velocity decay and jet spreading...