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Keywords: Wakes
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. February 2019, 141(2): 021105.
Paper No: FE-18-1156
Published Online: August 16, 2018
... Aerodynamics Compressible flows Drag Free shear layers Gas dynamics Supersonic flows Transonic flows Unsteady flows Wakes Base and afterbody flow constitute an important class of separated flows that govern the performance and stability of an aerospace vehicle. Investigations into the base...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. January 2019, 141(1): 011205.
Paper No: FE-17-1612
Published Online: June 29, 2018
.... Assoc. Editor: Sergio Pirozzoli. 26 09 2017 28 05 2018 Boundary layers Computational fluid dynamics RANS simulations Rotating fluids Turbulence Turbulence modeling Unsteady flows Vortices Wakes Boundary layer flows over three-dimensional (3D) curved bodies...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. February 2019, 141(2): 021102.
Paper No: FE-17-1726
Published Online: June 29, 2018
... filaments (0 < Re < 5) to flapping fins (Re > 20) with an intermediate range of Reynolds number (5 < Re < 20) where both types are present in the same swimming animal. Analysis suggests that these unsteady surfaces are mechanical oscillators coupled to their nonlinear wakes. A low-friction...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. January 2019, 141(1): 011203.
Paper No: FE-17-1792
Published Online: June 27, 2018
... in ground proximity with obstacle, so we chose one fixed height of the obstacle case (h 0 = 0.5b 0 ) to investigate, and the obstacle is placed transversally to the axis of the primary wake to be analyzed. The trajectories of the primary wake-vortex cores and the circulation profiles, as well...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. January 2019, 141(1): 011101.
Paper No: FE-18-1014
Published Online: June 27, 2018
... for the triangular pillar. A distinct bubble adjacent to the pillar was observed in the wake region for a substitutional long time. In addition, sporadic bubble shedding from both sides of the pillar was observed. The cavitation inception pattern seen for the triangular pillar may be attributed to a specific flow...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121202.
Paper No: FE-17-1634
Published Online: June 26, 2018
... to the velocity gradient, the sequence of the vortex street changes. It also has significant effect on the formation and composition of hovering vortex. To capture these features, each vortex is tracked as they form, detach, and move in the wake of the cylinder. Hovering vortex, formed due to coalescing...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121101.
Paper No: FE-17-1509
Published Online: June 13, 2018
... 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...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. June 2018, 140(6): 061202.
Paper No: FE-17-1448
Published Online: February 6, 2018
..., 2018. Assoc. Editor: Riccardo Mereu. 25 07 2017 02 01 2018 Free surface flows Lift Vortices Wakes Waves Flow past a circular cylinder close to a free surface has been studied in many applications of pipelines, offshore structures, and tidal power plants. The existence...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. April 2018, 140(4): 041206.
Paper No: FE-17-1333
Published Online: December 4, 2017
... flexibility effects on impulse are more important at the largest Reynolds numbers. The impulsive performance of the system is derived from direct thrust force measurements. Passive flexibility alters vortex strength and formation in the wake of the pitching foil. These changes in the wake formation can...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. February 2018, 140(2): 021201.
Paper No: FE-16-1504
Published Online: November 3, 2017
...Robert Jaron; Antoine Moreau; Sébastien Guérin; Rainer Schnell A major source of contra-rotating open rotor (CROR) tonal noise is caused by the interaction of the front-rotor (FR) wakes with the aft-rotor blades. Inspired by chevron nozzles, which increase the mixing process in jet shear layers...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. February 2018, 140(2): 021111.
Paper No: FE-16-1574
Published Online: November 3, 2017
... the wake propeller and to predict the instability processes in the wake if it exists. Two Reynolds-averaged Navier–Stokes (RANS) models are used: the k–ω shear stress transport (SST) of Menter and an anisotropic two-equation explicit algebraic Reynolds stress model (EARSM). A hybrid RANS–large eddy...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. February 2018, 140(2): 021107.
Paper No: FE-16-1483
Published Online: October 31, 2017
... wake (LLFVW) code was recently integrated into the open source wind turbine simulation suite qblade . This paper describes some of the necessary adaptions of the algorithm, which differentiates it from the usual application in HAWT simulations. A focus is set on achieving a high robustness...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. February 2018, 140(2): 021106.
Paper No: FE-16-1470
Published Online: October 24, 2017
...Matthieu Boudreau; Guy Dumas An analysis of the vortex dynamics in the wake of three different freestream turbine concepts is conducted to gain a better understanding of the main processes affecting the energy recovery in their wakes. The turbine technologies considered are the axial-flow turbine...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. January 2018, 140(1): 011101.
Paper No: FE-17-1035
Published Online: September 20, 2017
... Compressible flows Computational fluid dynamics Experimental techniques Hydrodynamics Measurement techniques Pressure drop Pumps Rotating fluids Turbulence modeling Unsteady flows Vortices Wakes Fluid mechanics Turbomachines Hydropower plays a vital role to maintain stable...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. December 2017, 139(12): 121202.
Paper No: FE-17-1078
Published Online: September 1, 2017
... that the variation of stability is attributed to the different spatial variation trends of the backflow velocity in the near- and far-wake regions for various cylinder geometries. The results from the stability analysis are also verified with those of the direct simulations, and very good agreement is achieved...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. September 2017, 139(9): 091104.
Paper No: FE-16-1047
Published Online: June 28, 2017
... 2017 Drag Duct Pressure drop Vortices Wakes Channel Pipe flows Short pin-fins with H / D  ≤ 4 in channel flows promote local accelerations and strong secondary flows near the endwall to enhance the convective heat transfer, but also result in the high pressure penalty [ 1 , 2...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. August 2017, 139(8): 081202.
Paper No: FE-16-1628
Published Online: May 18, 2017
... bodies which strongly depend on the evolution of the vortex shedding. The frequency of vortex detachment for flow past cylinder problems can be modified when the cylinder moves, promoting the modification of the wake of vortices. Synchronization phenomena appear when the frequencies of the resulting flow...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. July 2017, 139(7): 071107.
Paper No: FE-16-1529
Published Online: April 28, 2017
...Gokturk Memduh Ozkan; Erhan Firat; Huseyin Akilli The control of flow in the wake of a circular cylinder by an attached permeable plate having various porosity ratios was analyzed experimentally using both particle image velocimetry (PIV) and dye visualization techniques. The force measurements...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. June 2017, 139(6): 061202.
Paper No: FE-16-1514
Published Online: April 20, 2017
... and a clustering technique allowed us to gain insight into the physical mechanisms involved in these phenomena. This highlights that the symmetrical forcing of the wake flow at its resonant frequency with the TED promotes symmetrical vorticity patterns which favor drag reductions. 1 Corresponding author...