large-Reynolds-number flows
High Reynolds number vortex flows: Vortex/Rayleigh wave interaction and the compressible leading-edge vortex
... T he work undertaken in this thesis falls into two parts. The term ‘vortex’ is applicable to each, although rather in a different context. In P art I we discuss the stability of a lam inar boundary layer to inviscid ...
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The electromotive force in multi-scale flows at high magnetic Reynolds number
... of large-scale shear. A number of points may be made ...these flows it appears as though the large and small scales separately produce similar mean emfs to each ...the flows at ...
15
Vortex Method for computing high Reynolds number flows: Increased accuracy with a fully mesh less formulation
... high Reynolds numbers is severely hindered by the numerical dissipation present in the numerical methods used for computational fluid dynamics ...separated flows, which are by and large intractable ...
191
Propulsion of a two sphere swimmer
... sufficiently large amplitudes, can lead to motion of the center of mass of the two ...streaming Reynolds number, suggesting that the propulsion is related to streaming ...streaming Reynolds ...
5
Large-Eddy Simulation/ Reynolds-Averaged Navier-Stokes Hybrid Schemes for High Speed Flows
... The Reynolds stresses can then be determined from the Boussinesq ...with Reynolds number, since all scales of turbulent motion are ...such flows”([3], page ...
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Inverse cascade and symmetry breaking in rapidly-rotating Boussinesq convection
... a large-scale horizontal flow depends on two ...no large-scale circulation was observed very close to the onset of convection where the flow is organised in laminar and quasi-steady columnar structures ...
21
A comparative study of boundary conditions for lattice Boltzmann simulations of high Reynolds number flows
... ical system needs to have either a different viscosity or a differ- ent characteristic length while the characteristic velocity must be changed. This turns out to be, however, inconsistent with common CFD practice. In ...
8
Unsteady forces and flows in low Reynolds number hovering flight: two dimensional computations vs robotic wing experiments
... In addition to comparing the experimental and computational forces, we also evaluate the relative importance of unsteady effects. These include wing acceleration, both in translation and rotation, and interactions ...
12
Complex Fluids in Microchannel Flows at Low Reynolds Number: Elastic Instabilities and Rheology
... Complex fluids are a broad class of materials that are usually homogeneous at the macroscopic scale and disordered at the microscopic scale, but possess structure at an intermediate scale. Examples include milk, yogurt, ...
148
Design and Analysis of a Water Channel for Characterization of Low Reynolds Number Flows
... Fig. 3 Plate boundary conditions for floor and ends of channel Fig. 4 Hydrostatic pressure on water channel panel In most of the channel design, the limit ing factor was not structural integrity, but was instead ...
8
Dissipative particle dynamics modeling of low Reynolds number incompressible flows
... We have reduced the mass of DPD particles to induce an incompressible slow viscous flow in a DPD fluid and to enhance its dynamic response. This approach appears effective as the simplicity of the DPD algorithm still ...
23
Large-Eddy Simulations of Fully Developed Turbulent Channel and Pipe Flows with Smooth and Rough Walls
... fluid flows are those bounded by solid walls with surface roughness and flows exhibiting high Reynolds number turbulence [52, ...higher Reynolds number, and in doing so, shedding ...
120
The formation of shear and density layers in stably stratified trubulent flows: linear processes
... geophysical flows and laboratory experiments when the layering involves both density and mean velocity ...turbulent flows have some quite distinct characteristics (Fernando & Hunt ...stratified ...
21
Characterisation of Low Reynolds Number Fountain Behaviour
... and Reynolds numbers in figure ...a number of other sub- groupings have been made which are described ...both Reynolds and Froude number ...
5
Low Reynolds number swimming and controllability
... the Reynolds number Re = LV /ν used to estimate the ratio of the inertial effects to the viscous ones for a swimmer of size L moving at speed V in a fluid of kinematic viscosity ν can vary over many orders ...
14
Low-Reynolds-number fountain behaviour
... Froude number in the transitional region tested in this study is Fr = ...Froude number of Fr ≈ √ 2 the fountain flow becomes ...of Reynolds numbers, buoyancy forces can stabilize the flow completely at ...
21
Water Hammer Investigation of the Shut-Down of a High-Head Hydropower Plant at Very High Reynolds Number Flows
... a number of steady and unsteady conditions has been performed on the plant’s open channel, pressurized and tail race sub-systems with the primary goal of defining measures that will enable the achievement of the ...
11
Modelling of flow and heat transport in vertical loop ground heat exchangers
... are Reynolds Averaged Navier-Stokes models (RANS), Large Eddy Simulation (LES) models, and Detached Eddy Simulation models (DES) for simulating turbulent ...the large scale eddies, it tends to ...
189
On univalent solutions of the biharmonic equation
... Biharmonic functions arise in many physical situations, particularly in fluid dynamics and elasticity problems. Most important applications of the theory of functions of a com- plex variable were obtained in the plane ...
10
Hybrid Large-Eddy Simulation/Reynolds-Averaged Navier-Stokes Methods and Predictions for Various High-Speed Flows
... The evolution of turbulence modeling has depended on a balance of numerous factors. The chief concern of a turbulence model is to accurately reflect the physics of a given fluid flow. Another consideration is the ...
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