An active flow control strategy for the suppression of vortex structures behind a circular cylinder

Suppression of vortex-induced vibration using moving surface boundary-layer control

“…The Strouhal number estimated for the U c =U ¼ 0 cylinder is St ¼ 0:19 70:02. Muddada and Patnaik (2010) also found very close Strouhal numbers for plain and U c =U ¼ 0 cylinders, 0.170 and 0.172, respectively, at Re ¼ 100.…”

“…Muddada and Patnaik (2010) made further developments to this control strategy, which was employed to a circular cylinder fitted with two simple rotary type mechanical actuators located at 1201. Modi (1997) presents a review of experimental and numerical studies using the MSBC method to different applications, as such as, aeronautics (airfoils), flat plate, rectangular prisms and D-section, and automotive (tractor-trailer truck).…”

Flow control with rotating cylinders

“…Rotating cylinders have also been used successfully in closed-loop feedback systems for the suppression of vortex shedding from bluff bodies. Examples can be found in the work by Muddada & Patnaik (2010), Beaudoin et al (2006), and Patnaik & Wei (2002).…”

“…In contrast, rotating the control cylinders above a critical rate stabilized the wake. The ability of rotating cylinders to stabilize the wake of a main cylinder, especially at low Reynolds numbers, has been shown by Mittal (2001) and Muddada & Patnaik (2010). Figure 6 compares instantaneous simulation streamlines from the numerical simulations with those from corresponding potential flow models.…”

A stable projection method for the incompressible Navier–Stokes equations on arbitrary geometries and adaptive Quad/Octrees

“…This is also a good example of a non-graded mesh with a jump of three levels between neighbor cells for the highest resolution. -0 .20 Braza et al [9] 0.16 0.20 Mahir et al [40] 0.172 0.192 Laroussi et al [34] 0.173 0.199 Muddada et al [50] 0.170 -Present 0.172 0.203 where X 0 = 0.7957D (with D = 2r) is the amplitude of the oscillation. We enforce Dirichlet boundary conditions on the edge of the computational domain and set Re = 100 and KC = 5.…”