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Keywords: turbulent boundary layer
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Proceedings Papers

Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T03A020, July 13–15, 2020
Paper No: FEDSM2020-20457
... Abstract In this paper, we use a CFD analysis of a simplified, 2D geometry to study the ability of mako shark denticles to mitigate flow separation. We represent the viscous sublayer below a turbulent boundary layer streak as a Couette flow. Incipient separation is simulated by balancing upper...
Proceedings Papers

Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T03A024, July 13–15, 2020
Paper No: FEDSM2020-20317
... Abstract The current study explores the influence of polymer drag reduction on the near-wall velocity distribution in a turbulent boundary layer. The classical view is that the polymers modify the intercept constant within the log-region without impacting the von Kármán coefficient, which...
Proceedings Papers

Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T04A022, July 13–15, 2020
Paper No: FEDSM2020-20293
... Abstract Large-eddy simulations (LES) of incompressible turbulent boundary-layer flows can simulate a fundamental unsteady turbulent flow, including time-variant streamwise and wall-normal velocity as well as the near-wall locations of significant turbulence intensities. A typical illustration...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A001, July 28–August 1, 2019
Paper No: AJKFluids2019-4647
... Abstract How microbubbles behave inside turbulent boundary layers are investigated experimentally. Water electrolysis is applied for generation of microbubbles in water, of which electrodes are flash mounted on the solid wall in the upstream section of the measurement area. Four kinds of solid...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A046, July 28–August 1, 2019
Paper No: AJKFluids2019-5272
... Abstract To investigate the development process of a void wave, spatio-temporal fluctuation of void fraction, we examined experimentally a turbulent boundary layer with bubble injections. The experiments performed on a flat bottom of 4-mlong transparent model ship towed in a tank of 100 m...
Proceedings Papers

Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A048, July 28–August 1, 2019
Paper No: AJKFluids2019-5457
... bubbles hydrofoil turbulent boundary layer AIR ENTRAINMENT AND BUBBLE GENERATION BY A HYDROFOIL IN A TURBULENT CHANNEL FLOW Ichiro Kumagai1, Kakeru Taguchi School of Science and Engineering, Meisei University Hino, Tokyo, Japan Chiharu Kawakita, Tatsuya Hamada National Maritime Research Institute...
Proceedings Papers

Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 247-255, July 30–August 2, 2007
Paper No: FEDSM2007-37042
... 26 03 2009 In this study, the influence of a drag-reducing surfactant on the turbulent boundary layer under different solution concentrations and temperatures was extensively investigated using a two-component laser-Doppler velocimetry system. It is found that the drag reduction ratio...
Proceedings Papers

Proc. ASME. FEDSM2007, Volume 2: Fora, Parts A and B, 633-638, July 30–August 2, 2007
Paper No: FEDSM2007-37592
... to document the effect of the cavity on the flow in the presence of adverse pressure gradient. Turbulent boundary layer cavity particle image velocimetry adverse pressure gradient diverging channel p si b in th b S g p re in re tr o (R w Proceedings of FEDSM2007 5th Joint ASME/JSME Fluids...
Proceedings Papers

Proc. ASME. FEDSM2006, Volume 1: Symposia, Parts A and B, 1585-1594, July 17–20, 2006
Paper No: FEDSM2006-98569
... turbulent boundary layer the polymer flow rate per unit span of the injection Proceedings of FEDSM2006 2006 ASME Joint U.S. - European Fluids Engineering Summer Meeting where large polymer DR occurs. In the current work, a confocal-style laser induced fluorescence based probe was developed and used...