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Keywords: flow separation
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Proceedings Papers
Proc. ASME. FEDSM2024, Volume 1: Fluid Applications and Systems (FASTC); Fluid Measurement and Instrumentation (FMITC); Fluid Mechanics (FMTC); Multiphase Flow (MFTC), V001T03A003, July 15–17, 2024
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2024-123929
... an unimodal distribution, while vertical velocity fluctuation shows a bimodal distribution at the point of maximum vertical fluctuating velocity. flow separation uniform flow particle image velocimetry right-trapezoidal prism Proceedings of the ASME 2024 Fluids Engineering Division Summer Meeting...
Proceedings Papers
Proc. ASME. FEDSM2024, Volume 1: Fluid Applications and Systems (FASTC); Fluid Measurement and Instrumentation (FMITC); Fluid Mechanics (FMTC); Multiphase Flow (MFTC), V001T03A017, July 15–17, 2024
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2024-131252
... Abstract The turbulent characteristics of flow separation induced by trapezoidal prisms subjected to uniform flow are studied using particle image velocimetry (PIV). The streamwise aspect ratios (upper length to lower length) were AR1.0_2.5, AR2.0_2.5, and AR2.0_4.0. The Reynolds number (based...
Proceedings Papers
Proc. ASME. FEDSM2022, Volume 1: Fluid Applications and Systems (FASTC); Fluid Measurement and Instrumentation (FMITC); Fluid Mechanics (FMTC), V001T03A030, August 3–5, 2022
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2022-87654
... region was slowest for AR2, meanwhile, AR3 and AR4 revealed mean reattachment over the cylinder. The magnitudes of the Reynolds stresses and triple velocity correlations were consistently higher along the cylinder centerline for AR1 compared to the other cases. flow separation uniform flow bluff...
Proceedings Papers
Proc. ASME. FEDSM2022, Volume 1: Fluid Applications and Systems (FASTC); Fluid Measurement and Instrumentation (FMITC); Fluid Mechanics (FMTC), V001T03A010, August 3–5, 2022
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2022-86964
... are presented to quantitatively assess the effects of Reynolds number and aspect ratio. flow separation uniform flow bluff body Proceedings of the ASME 2022 Fluids Engineering Division Summer Meeting FEDSM2022 August 3-5, 2022, Toronto, Ontario, Canada FEDSM2022-86964 EFFECTS OF REYNOLDS NUMBER...
Proceedings Papers
Turbulent Characteristics of the Wake Flow Around Rectangular and Trapezoidal Prisms in Uniform Flow
Proc. ASME. FEDSM2022, Volume 1: Fluid Applications and Systems (FASTC); Fluid Measurement and Instrumentation (FMITC); Fluid Mechanics (FMTC), V001T03A029, August 3–5, 2022
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2022-87650
... Abstract The turbulent characteristics of flow separation induced by a trapezoidal and two rectangular prisms immersed in a uniform flow were studied experimentally using particle image velocimetry. The streamwise aspect ratios (AR) of the two rectangular prisms were 3 and 4. The streamwise AR...
Proceedings Papers
Proc. ASME. FEDSM2022, Volume 1: Fluid Applications and Systems (FASTC); Fluid Measurement and Instrumentation (FMITC); Fluid Mechanics (FMTC), V001T03A026, August 3–5, 2022
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2022-87640
.... The results show that mean flow separation at the leading edge is not affected by the different geometries and the streamwise aspect ratios. However, the mean recirculation bubbles over the prism and in the wake region show significant differences. Mean flow reattaches over the prism in the AR4 case...
Proceedings Papers
Proc. ASME. FEDSM2021, Volume 3: Fluid Mechanics; Micro and Nano Fluid Dynamics; Multiphase Flow, V003T05A026, August 10–12, 2021
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2021-65448
.... The mean flow topology shows flow separation at the leading edge is not affected by the streamwise aspect ratios. However, the primary, secondary and wake vortexes show significant differences. Mean flow reattaches over the cylinder at 4.30 cylinder heights in the AR5 case while there is no mean...
Proceedings Papers
Proc. ASME. FEDSM2021, Volume 3: Fluid Mechanics; Micro and Nano Fluid Dynamics; Multiphase Flow, V003T05A029, August 10–12, 2021
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2021-65593
... double peaks. The distributions of the vertical Reynolds normal stress, however, are concentrated in the wake about the horizontal centerline of the cylinder and reveal only single peaks. turbulent boundary layer square cylinder wall proximity flow separation particle image velocimetry...
Proceedings Papers
Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T03A047, July 13–15, 2020
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2020-20426
... Suzen model dielectric barrier discharge (DBD) flow separation plasma actuator SIMULATIONS OF FLOW SEPARATION CONTROL USING DIFFERENT PLASMA ACTUATOR MODELS Hatem Abdelraouf1, Sadek Z. Kassab2, Ahmed M. Nagib Elmekawy3 Department of Mechanical Engineering, Faculty of Engineering, Alexandria...
Proceedings Papers
Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T03A042, July 13–15, 2020
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2020-20257
... elevated regions of the Reynolds stresses, eddy viscosity and correlation coefficient are observed in both cases with the peak values at a vertical location corresponding to the maximum elevation of the mean separating streamline. flow separation wall roughness bluff body THE EFFECTS OF UPSTREAM...
Proceedings Papers
Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T03A043, July 13–15, 2020
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2020-20258
... Abstract The unsteady characteristics of flow separations induced by a forward-facing step immersed in thick oncoming turbulent boundary layers developed over smooth and fully rough upstream walls were experimentally studied using time-resolved particle image velocimetry. The upstream boundary...
Proceedings Papers
Proc. ASME. FEDSM2020, Volume 2: Fluid Mechanics; Multiphase Flows, V002T03A044, July 13–15, 2020
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2020-20263
... the flapping motion of separation bubble, shows remarkable synchronization. flow separation forward-backward facing step 1 Contact author: fangx@myumanitoba.ca EFFECTS OF STREAMWISE ASPECT RATIO ON TURBULENT FLOWS OVER FORWARD-BACKWARD FACING STEPS Heath Chalmers, Xingjun Fang1, and Mark F. Tachie...
Proceedings Papers
Proc. ASME. FEDSM2009, Volume 1: Symposia, Parts A, B and C, 323-329, August 2–6, 2009
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2009-78297
... has been paid to flow separations at part-load conditions. The analysis of the measured results shows that the flow separations at two adjacent impeller channels are quite different at some part-load conditions. The separations generally exhibit a two-channel characteristic. Keywords: Time-resolved...
Proceedings Papers
Proc. ASME. FEDSM2002, Volume 1: Fora, Parts A and B, 1601-1606, July 14–18, 2002
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2002-31121
... each phases owing to the depression of ear layer near the wall. ords: Flow separation, Shear layer, Phase averaging, let transformation, Periodic fluctuation. ODUCTION eparation phenomenon in a flow becomes the source of tion and noise which lead to the crucial damage of the mance of machines...
Proceedings Papers
Active Separation Control in Circular and Transitioning S-Duct Diffusers Using Vortex Generator Jets
Proc. ASME. FEDSM2006, Volume 2: Fora, 715-723, July 17–20, 2006
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2006-98391
... by about 30 percent in both the diffusers. The physical chanism of the flow control devices used has been explored ing smoke visualization images. ywords: S-duct diffusers, flow separation, active flow ntrol, Vortex generator jets. TRODUCTION S-duct diffusers are specially designed inlets through ich air...