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Journal Articles
Article Type: Research-Article
J. Fluids Eng. October 2022, 144(10): 101207.
Paper No: FE-22-1102
Published Online: May 19, 2022
...Puxuan Li; Matthew Campbell; Ning Zhang; Steve J. Eckels This study proposes a numerical model to collect and analyze relationships between flow structures and drag forces on a microfin enhanced surface. We utilized a large eddy simulation (LES) with a localized, dynamic kinetic energy, subgrid...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. June 2022, 144(6): 061113.
Paper No: FE-21-1455
Published Online: April 5, 2022
... and drag are compared with the results on the flat substrate. Enhanced drag and significantly enhanced lift are observed as the test particle is situated near the summit of the hill. 1 Corresponding author. e-mail:  LLT0@cdc.gov This work is in part a work of the U.S. Government. ASME disclaims...
Includes: Supplementary data
Journal Articles
Article Type: Research-Article
J. Fluids Eng. February 2019, 141(2): 021105.
Paper No: FE-18-1156
Published Online: August 16, 2018
... shedding. Aerodynamics Compressible flows Drag Free shear layers Gas dynamics Supersonic flows Transonic flows Unsteady flows Wakes The authors would like to express their sincere gratitude to A. Narayanaswami, V. Biju, and A. Narayana for their unstinted support during the model...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. February 2019, 141(2): 021102.
Paper No: FE-17-1726
Published Online: June 29, 2018
... lock-in error as the difference between Triantafyllou's fish Strouhal number and the tangent of the vortex-shedding angle, an experiment is discussed for measuring the minimum drag of live fish. It has been shown that vortex shedding in oscillatory wakes affects the upstream angle of attack...
Journal Articles
Article Type: Review Articles
J. Fluids Eng. February 2019, 141(2): 020801.
Paper No: FE-17-1623
Published Online: June 29, 2018
... and, in modern times, pneumatic blowing and synthetic jet actuators have been employed to prevent flow separation and increase base pressure at the rear of road vehicles [ 57 , 58 ]. This, in turn, leads to drag reduction and improved fuel efficiency in road cars and heavy trucks. Another highly effective active...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2019, 141(1): 011103.
Paper No: FE-18-1056
Published Online: June 27, 2018
... analysis are also carried out for the pitching blade. The performance of the investigated turbulence models is evaluated at various critical points on the hysterias loop of lift and drag coefficients. The predictions of the investigated turbulence models are in good agreement at lower angle of attack, i.e...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121202.
Paper No: FE-17-1634
Published Online: June 26, 2018
... rotates from β  = 40 deg to 150 deg, the amount of fluid decelerated will increase with G . This may be the reason for higher lift forces as G is increased. Mean drag coefficient ( C D ¯ ) decreases with the increase in AR. It also decreases with the increase in α...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2018, 140(12): 121101.
Paper No: FE-17-1509
Published Online: June 13, 2018
... configuration is actuated by means of a synthetic jet boundary condition. Overall, the effect of the actuation is beneficial. The actuation of the AFC decreases drag, stabilizes the flow, and reduces the size of the side recirculation bubble. σ k u = σ k ( f k 2 / f ε...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. October 2018, 140(10): 101108.
Paper No: FE-17-1573
Published Online: May 18, 2018
...Upender K. Kaul; Nhan T. Nguyen A Reynolds-averaged Navier–Stokes (RANS) computational study was conducted to investigate the effect of various variable camber continuous trailing edge flap (VCCTEF) configurations on the lift and drag of a NASA generic transport model (GTM) wing section. Out...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. June 2018, 140(6): 061205.
Paper No: FE-17-1104
Published Online: March 27, 2018
... width, ( 19.28 mm ≤ W ≤ 25.75 mm ), and angle of attack, ( 0 deg ≤ ψ ≤ 12.6 deg ). A total of six wheels and five tires were tested. Coefficient of drag area ( C d A ) and coefficient of side force area ( C s A ) versus angle of attack (ψ) were measured using a multi-axis force transducer. Wind tunnel...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. May 2018, 140(5): 051204.
Paper No: FE-17-1437
Published Online: January 24, 2018
...Xin Zhang; Xili Duan; Yuri Muzychka Flow drag reduction induced by chemical additives, more commonly called drag-reducing agents (DRAs), has been studied for many years, but few studies can manifest the mechanism of this phenomenon. In this paper, a new mathematical model is proposed to predict...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. May 2018, 140(5): 051202.
Paper No: FE-17-1103
Published Online: January 9, 2018
... Division of ASME for publication in the J OURNAL OF F LUIDS E NGINEERING . Manuscript received February 17, 2017; final manuscript received November 5, 2017; published online January 9, 2018. Assoc. Editor: Oleg Schilling. 17 02 2017 05 11 2017 Bubbly flows Drag Fluid transients...
Topics: Bubbles, Pipes
Journal Articles
Article Type: Research-Article
J. Fluids Eng. May 2018, 140(5): 051101.
Paper No: FE-17-1300
Published Online: December 26, 2017
...Michell Luiz Costalonga; Bruno Venturini Loureiro; Edson J. Soares We analyze the use of water solutions of Xanthan Gum (XG) for drag reduction (DR) in annular spaces. We provide a direct quantitative comparison between the DR in an annulus and that in straight tubes. We can fairly compare the data...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. April 2018, 140(4): 041202.
Paper No: FE-17-1283
Published Online: November 17, 2017
.... , Nudds , R. L. , and Thomas , A. L. R. , 2003 , “ Flying and Swimming Animals Cruise at a Strouhal Number Tuned for High Power Efficiency ,” Nature , 425 , pp. 707 – 710 . 10.1038/nature02000 2 asknature.org c = damping c = fin chord C Dj 1 = drag...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. March 2018, 140(3): 031204.
Paper No: FE-17-1224
Published Online: October 19, 2017
... online October 19, 2017. Assoc. Editor: Daniel Livescu. 12 04 2017 02 09 2017 Complex flows Drag Duct Rotating fluids Channel Pipe flows Ball valve, as a necessary component in the pipeline system, is commonly used to regulate flow rate and flow direction or control...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. January 2018, 140(1): 011104.
Paper No: FE-17-1171
Published Online: September 20, 2017
... Science Foundation of China (Grant Nos. 51276046 and 51421063). c = wing chord C D = drag coefficient C L = lift coefficient K p = potential lift coefficient K v = vortex lift coefficient Re = Reynolds number based on the chord wing, Re = U...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. December 2017, 139(12): 121204.
Paper No: FE-16-1495
Published Online: September 20, 2017
... correlation. A f = forward projected surface area of a single roughness element A s = windward wetted surface area of the element C = a constant in the velocity profile, Eq. (4) C D = form drag coefficient C f = 2 τ w / ρu 2 s , skin friction coefficient...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. November 2017, 139(11): 111103.
Paper No: FE-16-1749
Published Online: August 10, 2017
...Shiyang Hou; Jibin Hu; Zengxiong Peng The drag torque caused by the viscous shear in open multiplate wet clutches has been studied in most available literature whose focus is placed on low circumferential speed. However, the drag torque increases drastically in the high circumferential speed range...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. October 2017, 139(10): 101102.
Paper No: FE-16-1437
Published Online: July 19, 2017
...; final manuscript received May 2, 2017; published online July 19, 2017. Assoc. Editor: Feng Liu. 11 07 2016 02 05 2017 Aerodynamics Drag Lift Pressure coefficient traces showing the effect of the h / c  = 0.04 flap for Xf/ c  = 0.913 and 0.988 are displayed in Fig. 11...
Journal Articles
Article Type: Research-Article
J. Fluids Eng. October 2017, 139(10): 101204.
Paper No: FE-17-1081
Published Online: July 18, 2017
... NGINEERING . Manuscript received February 6, 2017; final manuscript received April 27, 2017; published online July 18, 2017. Assoc. Editor: John Abraham. 06 02 2017 27 04 2017 Boundary layers Drag Gas dynamics Measurement techniques PIV Fluid mechanics Wall shear stress τ w...