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Showing 1 to 12 of 12 for “"Flow past a cylinder"”.
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Reduced-Order Modeling of Complex Engineering and Geophysical Flows: Analysis and Computations
… are frequently used in the simulation of complex flows to overcome the high computational cost of direct numerical simulations, especially for three-dimensional nonlinear problems. Proper orthogonal decomposition, as one of the most commonly used tools to generate reduced-order models, has been …
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Neural Operator Models as Applied to Fluid Flow Systems and Real Ocean Dynamics
… for reproducing and predicting classic fluid flows and simulations of realistic ocean dynamics. We first briefly evaluate the capabilities of such deep neural operator models when trained on a simulated two-dimensional fluid flow past a cylinder. We then investigate their application to …
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Active feedback control of a wake flow via forced oscillations based on a reduced model
As it is well known, the flow past a cylinder consists of a symmetric recirculation bubble of vortices at small Reynolds numbers. As Reynolds number increases, the bubble becomes unstable and develops into a Karman vortex street of alternating vortices. This instability is responsible for the …
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Algorithms for particle remeshing applied to smoothed particle hydrodynamics
… the simulation of nearly incompressible fluid flows. As with the remeshing schemes used in mesh and grid-based methods, there is a need to use localized refinement in particle methods to reduce computational costs. Various forms of particle refinement have been proposed for particle-based …
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A Finite-Element Coarse-GridProjection Method for Incompressible Flows
… used for the incompressible Navier Stokes flow computations. This version is validated on standard test cases with realistic boundary conditions using unstructured triangular meshes. We also pioneer investigations of the effects of CGP on the accuracy of the pressure field. It is found that …
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Active and passive separation control for drag reduction of a maneuvering hull form
… particular is limited by resistance due to cross-flow separation. Hull forms with lower hydrodynamic resistance in maneuvers are able to follow trajectories with tighter turns and at higher speeds. Despite the progress that has been made in the control of two dimensional flow separation, little …
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Parallel Simulations, Reduced-Order Modeling, and Feedback Control of Vortex Shedding using Fluidic Actuators
In most of the engineering and industrial flow applications, one encounters fluid-structure interaction. This interaction can lead to some undesirable forces acting on the structure, causing its damage or fatigue. The phenomenon, being complex in nature, requires thorough understanding of the flow …
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Shape Optimisation for Hydrodynamic Stability and its Application to Cyclone Separators
… applications it is desirable to have a steady flow field that is stable to perturbations. This can be described through a global stability analysis. This is an eigenvalue problem which gives a series of mode shapes (the eigenfunctions) and their growth rates and frequencies (the eigenvalues). …
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Flow of viscoelastic fluids through banks of cylinders: an experimental and numerical investigation
… whether the pressure drop for a polymer melt flowing transversely through a square array of cylinders can be predicted using purely viscous models or whether a viscoelastic constitutive equation is required. To predict these pressure drops, finite element calculations were performed using the …
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Solutions to three laminar viscous flow problems by an implicit finite-difference method
… problems, (1) laminar incompressible viscous flow past a cylinder and a sphere, (2) laminar incompressible viscous flow past a finite flat plate (second-order solutions), and (3) laminar viscous past a sphere at a high Mach number. These problems are solved by using an implicit …
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High order stochastic transport and Lagrangian data assimilation
… tracer advection in a deterministic swirl flow, stochastic flow past a cylinder, and stochastic lid-driven cavity flow. We show that our schemes improve the consistency between reconstructed DO realizations and the corresponding MC realizations, and that we achieve the expected order of …
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Nodal integral methods for heat and mass transfer in curvilinear coordinates
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms