2015
DOI: 10.5028/jatm.v7i3.476
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Numerical Simulation of the Wake Structure and Thrust/Lift Generation of a Pitching Airfoil at Low Reynolds number via an Immersed Boundary Method

Abstract: In this study, an accurate computational algorithm in the context of immersed boundary methods is developed and used to analyze an incompressible flow around a pitching symmetric airfoil at Reynolds number (Re = 255). The boundary conditions are accurately implemented by an iterative procedure applied at each time step, and the pressure is also updated simultaneously. Flow phenomena, observed at different oscillation frequencies and amplitudes, are numerically modeled, and the physics behind the associated vor… Show more

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Cited by 4 publications
(3 citation statements)
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“…used to describe this case : the Keulegan-Carpenter number KC = U/f D and the Reynolds number Re = U D/ν, where U is the maximum velocity of the cylinder, D is the cylinder diameter and ν is the fluid kinematic viscosity. We reproduce some results obtained experimentally by Dütsch et al [50] and numerically by Guilmineau et al [51] and Hosseinjani et al [52], at Re = 100 and KC = 5.…”
Section: Discussionsupporting
confidence: 86%
“…used to describe this case : the Keulegan-Carpenter number KC = U/f D and the Reynolds number Re = U D/ν, where U is the maximum velocity of the cylinder, D is the cylinder diameter and ν is the fluid kinematic viscosity. We reproduce some results obtained experimentally by Dütsch et al [50] and numerically by Guilmineau et al [51] and Hosseinjani et al [52], at Re = 100 and KC = 5.…”
Section: Discussionsupporting
confidence: 86%
“…Besides, the deflected wakes have great benefits to the production of the thrust. Hosseinjani and Ashrafizadeh 20 explained that the asymmetrical reverse Kármán vortex street can generate the side force, but its physics is still not understood well.
Figure 10.Spanwise vorticity at different k red . (a) 1.24; (b) 2.48; (c) 4.96.
…”
Section: Resultsmentioning
confidence: 99%
“…Besides, the deflected wakes have great benefits to the production of the thrust. Hosseinjani and Ashrafizadeh [21] explained that the asymmetrical reverse Kármán vortex street can generate the side force, but its physics is still not understood well. Reynolds number is also an important parameter to affect the performance and vortex evolution of the oscillating foils.…”
Section: Effect Of the Pitching Amplitude And Reduced Frequencymentioning
confidence: 99%