86 citations · 290 across the 19 of their papers we have counts for
20 papers
Interaction of Sustained Vortex Shedding with a Phononic Subsurface: Effect of Positioning and Resonant Characteristics
Sangwon Park, Vinod Ramakrishnan, Arturo Machado Burgos +2
Phononic materials (PMs) have emerged as a promising candidate to passively and beneficially interact with unsteady flows. However, their fluid-structure interaction (FSI) with sep…
Quantifying the effect of resonant amplitude and frequency of phononic material vibrations on the coupled fluid-structure interaction dynamics in separated aerodynamic flows
Vinod Ramakrishnan, Arturo M. Burgos, Sangwon Park +2
Phononic materials (PMs) with engineered resonances have been leveraged for fluid-structure interaction (FSI) with fluid flow instabilities, yielding beneficial outcomes such as tr…
Beyond first-order accuracy in continuous-forcing immersed boundary methods, and their well-conditioned projection-based solution
Diederik Beckers, H. Jane Bae, Andres Goza
We introduce a refined immersed boundary (IB) methodology that is better-than-first-order accurate in practice, while preserving key properties of "continuous-forcing" IB approache…
Weakly coupled fluid-structure interaction between wall-bounded turbulent flows and defect-embedded phononic subsurfaces
Ching-Te Lin, Vinod Ramakrishnan, Andres Goza +2
We investigate the interaction between wall-bounded turbulence and defect-embedded phononic subsurface (D-Psub) using a weakly coupled fluid--structure framework, in which the flow…
A Framework to Systematically Study the Nonlinear Fluid-Structure Interaction of Phononic Materials with Aerodynamic Flows
Vinod Ramakrishnan, Arturo Machado Burgos, Sangwon Park +2
Phononic materials (PMs) are periodic media that exhibit novel elastodynamic responses. While PMs have made progress in vibration-mitigation applications, recent studies have demon…
Dynamic interactions between an aerodynamic flow and a flexible flat plate
Srikumar Balasubramanian, Andres Goza
Passive flow control via fluid-structure interaction (FSI) is a promising paradigm for unmanned aerial vehicles operating in vortex-dominated low Reynolds number regimes. A flexibl…
Intrinsic phase based proper orthogonal decomposition (IPhaB POD): a method for physically interpretable modes in near-periodic systems
Akhileshwar Borra, Zoey Flynn, Andres Goza +1
Fluid dynamics systems driven by dominant, nearly periodic large-scale dynamics are common across wakes, jets, rotating machinery, and high-speed flows. Traditional decomposition t…
Adjoint-based optimal actuation for separated flow past an airfoil
Ernold Thompson, Andres Goza
This study computes the optimal normal actuation on the surface of a NACA0012 airfoil at an angle of attack of 15° and a Reynolds number of Re = 1000, using costs defined for minim…
Bio-inspired variable-stiffness flaps for hybrid flow control, tuned via reinforcement learning
Nirmal J. Nair, Andres Goza
A bio-inspired, passively deployable flap attached to an airfoil by a torsional spring of fixed stiffness can provide significant lift improvements at post-stall angles of attack.…
Fluid-structure interaction of a bio-inspired passively deployable flap for lift enhancement
Nirmal J. Nair, Andres Goza
Birds have a remarkable ability to perform complex maneuvers at post-stall angles of attack. The passive deployment of self-actuating covert feathers in response to unsteady flow s…
Surface morphing for aerodynamic flows at low and stalled angles of attack
Ernold Thompson, Andres Goza
In the current work we numerically study the effect of traveling-wave surface morphing actuation on the suction surface of NACA0012 at Re = 1,000. Although this actuation strategy…
Flow-induced flapping of an inverted flag with non-uniform stiffness distribution
Andres Goza
We perform high-fidelity, two-dimensional (2D), fluid-structure interaction (FSI) simulations at a Reynolds number of of uniform flow past an inverted flag (i.e., clamped…
A strongly coupled immersed boundary method for fluid-structure interaction that mimics the efficiency of stationary body methods
Nirmal Jayaprasad Nair, Andres Goza
Strongly coupled immersed boundary (IB) methods solve the nonlinear fluid and structural equations of motion simultaneously for strongly enforcing the no-slip constraint on the bod…
Dynamics of an inverted cantilever plate at moderate angle of attack
Cecilia Huertas-Cerdeira, Andres Goza, John E. Sader +2
The dynamics of a cantilever plate clamped at its trailing edge and placed at a moderate angle () to a uniform flow are investigated experimentally and numericall…
Leveraging reduced-order models for state estimation using deep learning
Nirmal J. Nair, Andres Goza
State estimation is key to both analyzing physical mechanisms and enabling real-time control of fluid flows. A common estimation approach is to relate sensor measurements to a redu…
Connections between resonance and nonlinearity in swimming performance of a flexible heaving plate
Andres Goza, Daniel Floryan, Clancy Rowley
We investigate the role of resonance in finite-amplitude swimming of a flexible flat plate in a viscous fluid. The role of resonance in performance remains unclear for two reasons:…
Modal decomposition of fluid-structure interaction with application to flag flapping
Andres Goza, Tim Colonius
Modal decompositions such as proper orthogonal decomposition (POD), dynamic mode decomposition (DMD) and their variants are regularly used to educe physical mechanisms of nonlinear…
Global modes and nonlinear analysis of inverted-flag flapping
Andres Goza, Tim Colonius, John Elie Sader
An inverted flag has its trailing edge clamped and exhibits dynamics distinct from that of a conventional flag, whose leading edge is restrained. We perform nonlinear simulations a…
A strongly-coupled immersed-boundary formulation for thin deforming surfaces, with application to elastic beams
Andres Goza, Tim Colonius
We present a strongly-coupled immersed-boundary method for flow-structure interaction problems involving thin deforming bodies. The method is stable for arbitrary choices of solid-…
Accurate computation of surface stresses and forces with immersed boundary methods
Andres Goza, Sebastian Liska, Benjamin Morley +1
Many immersed boundary methods solve for surface stresses that impose the velocity boundary conditions on an immersed body. These surface stresses may contain spurious oscillations…