Vorticity Research Papers - Academia.edu (original) (raw)

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- Engineering, Computational Fluid Dynamics, Fluid Mechanics, Heat Transfer
- by john kim
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- Engineering, Fluid Mechanics, Turbulence, Boundary Layers
- by sada prabhu
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- Mechanical Engineering, Chemical Engineering, Oxy-Fuel Combustion, Vorticity
- by Laszlo Baranyi
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- Engineering, Mechanical Engineering, Civil Engineering, Aerospace Engineering
- by Gautam Biswas
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- Mechanical Engineering, Aerospace Engineering, Low Frequency, Vorticity
- by Hukam Mongia
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- Engineering, Fluid Mechanics, Modeling, Large Eddy Simulation
- by Osman Basaran
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- Engineering, Fluid Mechanics, Mesh generation, Finite element method
- by Lian-Ping Wang
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- Engineering, Fluid Mechanics, Parallel Processing, Vorticity
- by Christer Fureby
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- Engineering, Turbulence, Modeling, Vorticity

Fault rocks associated with the Pelling thrust (PT) in the Sikkim Himalayan fold thrust belt (FTB) change from SL tectonites to local, transport-parallel L-tectonites that are exposed in discontinuous klippen south of the PT zone. By estimating the incremental kinematic vorticity number (W k) from quartz c-axes fabric, oblique fabric, and subgrains, we reconstruct a first-order, kinematic path of these L-tectonites. Quartz c-axes fabric suggests that the deformation initiated as pure-shear dominated (~56e96%) that progressively became simple-shear dominated (~29e54%), as recorded by the oblique fabric and sub-grains in the L-tectonites. These rocks record a non-steady deformation where the kinematic vorticity varied spatially and temporally within the klippen. The L-tectonites record ~30% greater pure-shear than the PT fault rocks outside the klippen, and the greatest pure-shear dominated flow among the published vorticity data from major fault rocks of the Himalayan FTB. The relative decrease in the transport-parallel simple-shear component within the klippen, and associated relative increase of transport-perpendicular, pure-shear component, support the presence of a sub-PT lateral ramp in the Sikkim Himalayan FTB. This study demonstrates the influence of structural architecture for fault systems for controlling spatial and temporal variations of deformation fabrics and kinematic path of deforming thrust wedges.

- by Matty Mookerjee and +1
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- Earth Sciences, Structural Geology, Vorticity, Kinematics
- by Dr. Kavita Pabreja
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- Artificial Intelligence, Vorticity, ANFIS, Divergence
- by Daniel JOSEPH
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- Engineering, Multiphase Flow, Vorticity, Drag
- by Amaresh Dalal
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- Engineering, Heat Transfer, Mesh generation, Finite element method
- by javier jimenez
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- Engineering, Visualization, Fluid Mechanics, Vorticity
- by Roberto Zenit
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- Engineering, Multiphase Flow, Particle Image Velocimetry, Vorticity
- by Philip Richardson
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- Geochemistry, Oceanography, Ecology, Vorticity
- by Sujoy Saha
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- Mechanical Engineering, Aerospace Engineering, Turbulence, Heat Transfer
- by Maurizio Brocchini
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- Civil Engineering, Geology, Modeling, Vorticity
- by Joung-ho Lee
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- Engineering, Fluid Mechanics, Boundary Layers, Vorticity
- by steven yon
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- Mechanical Engineering, Aerospace Engineering, Vorticity, Numerical Simulation
- by Alfredo Caggianelli
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- Geology, Geochemistry, Geophysics, Vorticity
- by Praveen Ramaprabhu
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- Engineering, Finite Volume Methods, Fluid Mechanics, Large Eddy Simulation
- by Karim Shariff
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- Engineering, Fluid Mechanics, Stability, Vorticity
- by manfred krafczyk
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- Engineering, Numerical Method, Vorticity, Mathematical Sciences
- by David Lo Jacono
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- Engineering, Numerical Analysis, Vorticity, Mathematical Sciences

Fluid forces on a rotating and whirling centrifugal impeller in a volute are analyzed with the assumption of a two-dimensional rotational, inviscid flow. For simplicity, the flow is assumed to be perfectly guided by the impeller vanes. The theory predicts the tangential and the radial force on the whirling impeller as functions of impeller geometry, volute spacing, and whirl ratio. A good qualitative agreement with experiment is found.

- by Christopher Brennen
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- Vibration, Stability, Vorticity, Fluids

Computational modeling aspects of weak plunging wave breaking, over a relatively mild sloping laboratory beach, were investigated in the present paper. Comparisons against latest elaborate experimental data were used to support the discussion. Smoothed Particle Hydrodynamics method was implemented as a numerical tool and the recently enhanced version of the academic ‘open source’ code SPHysics v.2 was ratified. Fine spatial resolution calibration was undertaken in an attempt to render effective a Sub-Particle Scale Smagorinsky-type turbulence closure that treats energy dissipation of eddy formations for the unresolved flow scales. Fine visual reproduction of the ragged freesurface flow deformation was supplemented with plausible results concerning classic wave dynamics characteristics, sophisticated turbulent surf-zone features and wave-induced currents.

- by Christos V Makris and +1
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- Vorticity, Smoothed Particle Hydrodynamics, Stokes drift, Coherent Structures
- by Jacek Pozorski
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- Engineering, Multiphase Flow, Two Phase Flow, Large Eddy Simulation
- by Muammer Ozgoren
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- Mechanical Engineering, Aerospace Engineering, Vorticity, SPHERE
- by Stephen Cowley
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- Engineering, Fluid Mechanics, Boundary Layers, Vorticity

This article intends to fathom a development by M.Tailherer which introduces a second gravitational equation devised to complete General Relativity (TGR), based on the ansatz of equating the curvature tensor opportunely contracted to the 4-vorticity by a new constant S as measure of the intrinsic inertia of the curved Space-Time. After justifying the need to deal with the 2nd fundamental tensor in Relativity in discussing the dynamics of Space-Time structure, it has been shown how the model exhibits unforeseen analogies with the electromagnetic theory. As direct continuation of the analysis of the gravitational wave propagation in free space, it has been seen that on asymptotic conditions the polarization state can be retrieved as mixture of two independent modes likewise TGR as from harmonic constraints on the homogeneous solution of wave equation. Actually, in this gravitational framework, at least for one polarization state, transverse waves propagate causing equal in-phase deformation displacement, not counter-phase as expected in gravitational interferometry experiments at present status. Computation of gravitational power losses for the keplerian system B 1913+16 in the solution by approximations of the inhomogeneous problem has been carried out to the 1st order, which has allowed the attempt of the assessment of a new universal gravitational constant for the first time ever.

- by Sandro Antonelli
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- Field Theory, Partial Differential Equations, Physics, Theoretical Physics
- by Micah Jessup
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- Earth Sciences, Vorticity, Flow, Extrusion
- by Karim Shariff
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- Energy Conservation, Strain Rate, Vorticity, High Frequency
- by Karim Shariff
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- Engineering, Fluid Mechanics, Large Eddy Simulation, Flow Control
- by Yiannis Andreopoulos
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- Engineering, Fluid Mechanics, Boundary Layers, Strain Rate

This paper presents numerical simulation results for vortex-induced vibration of a circular cylinder in laminar flow. A vortex method is implemented to solve the two-dimensional Navier-Stokes equations in terms of vorticity. In order to validate the numerical code, the flow past a fixed cylinder is first investigated for which enough experimental and numerical results are available. Basic characteristics of the dynamic response and vortex shedding for an elastically mounted circular cylinder are then investigated for 70 < Re < 170. The lock-in phenomenon is captured at certain reduced velocities where the lift coefficient takes a considerable value associated with a high amplitude response. The wake structure exhibits the 2S or C (2S) modes of vortex shedding in this range of Reynolds numbers, as opposed to the 2P mode which is observed in the turbulent flow regime. The numerical results are in acceptable agreement with available experimental and numerical data.

- by Taneda Singh
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- Mechanical Engineering, Applied Mathematics, Modeling, Fluid Dynamics

aim of this experimental study is to determine the flow characteristics of
a single and multiple slotted-staggered cylinders placed in a rectangular water channel with a narrow gap using the Particle Image Velocimetry technique. Qualitative flow visualization was initially employed in order to observe the overall nature of the vortical flow patterns for different configurations of cylinders. Quantitative flow visualization was secondly employed for whole configurations of cylinders in order to understand the physics of complex flow behaviour that gives rise to unsteady loading with the eventual intent of implementing control schemes
to enchance the rate of heat transfer hydrodynamically.

- by Roberto Zenit
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- Engineering, Multiphase Flow, Particle Image Velocimetry, Vorticity
- by Danesh Tafti
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- Engineering, Modeling, Heat Transfer, Large Eddy Simulation

... that a LES or detached eddy simulation (DES) could provide much better predictions of film effectiveness for such flows. ... 106114. BunkerR.S., 2002, Film Cooling Effectiveness Due to Discrete Holes Within a Transverse Surface... more

- by Srinath Ekkad and +1
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- Mechanical Engineering, Aerospace Engineering, Design, Modeling
- by Anvar Gilmanov and +1
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- Mechanical Engineering, Applied Mathematics, Computational Fluid Dynamics, Modeling
- by Mandar Tabib
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- Mechanical Engineering, Chemical Engineering, Design, Image Processing
- by Fabien Godeferd
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- Engineering, Fluid Mechanics, Topology, Vorticity

The two-dimensional Navier–Stokes equations, when subject to non-standard boundary conditions which involve the normal component of the velocity and the vorticity, admit a variational formulation with three independent unknowns, the vorticity, velocity and pressure. We propose a discretization of this problem by spectral element methods. A detailed numerical analysis leads to optimal error estimates for the three unknowns and numerical experiments confirm the interest of the discretization.

- by Mejdi Azaiez
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- Applied Mathematics, Numerical Analysis, Vorticity, Navier Stokes
- by Harry Swinney
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- Instrumentation, Multidisciplinary, Magnetic field, Mixing