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Showing 1 to 13 of 13 for “"vorticity generation"”.
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Characteristics of flame-turbulence interactions in freely propagating turbulent premixed flames under decaying and forced isotropic turbulence conditions
… influences flame topology, small-scale vorticity generation, and reaction-zone structure.
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Surfactant effects on the interaction of a three dimensional vortex pair with a free surface; and,
… tubes break down via instability and helical vorticity is generated. The most prominent feature at the surface is that associated with the connection of helical vorticity to the free surface. For clean surface, the helical vorticity would interact fully with the free surface and reconnects to …
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Dynamic control of aerodynamic forces on a moving platform using active flow control
… forces and moments are regulated by controlling vorticity generation and accumulation near the trailing edge of the airfoil using hybrid synthetic jet actuators. The dynamic coupling between the actuation and the time-dependent flow field is characterized using simultaneous force and particle …
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Generation of Downstream Vorticity Through the Use of Modified Trailing Edge Configurations
… passive techniques for producing streamwise vorticity, which in turn causes downstream wake diffusion and increased mixing. A more diffuse wake, when it impinges on the downstream stator, will produce lower noise levels as a result of this rotor-stator interaction. Furthermore, increased …
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Multiphase Flow Dynamics in Confined Domains—A DNS Study of Bubbly, Thermal and Riblet-Induced Turbulence
… number further intensifies rise velocities, vorticity generation, and wall-bounded turbulence, leading to stronger shear-layer instabilities and near-wall fluctuations. Energy budget analyses confirm that pseudo-turbulence emerges from the coupling of interfacial deformation, inertial forces, …
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Effect of latent heating on mesoscale vortex development during extreme precipitation: Colorado, September 2013
… near the surface. This gradient led to potential vorticity generation; a similar mechanism to that of a mesoscale convective vortex, except closer to the surface. Finally, an experiment where the latent heating was reduced by half after 1800 UTC 11 September resulted in no mesovortex development …
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Ignition and hydrodynamic ejections by laser-induced breakdowns
… flow, its dependence on details of the plasma generation, and how it can alter and tailor ignition and subsequent flame growth will facilitate incorporation into engineering applications such as internal combustion engines and supersonic propulsion systems. Direct numerical simulation with five …
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Insights into tornadogenesis and tornado dynamics from idealized simulations
… which suggest that all supercells have vertical vorticity maxima which could be intensified to tornado strength, but that the presence of a robust and strong low-level mesocyclone is the critical factor deciding about tornadogenesis success. To test this conclusion, the relative importance of …
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Supersonic Corner Flows in Rectangular Channels
… as half. This improvement is associated with vorticity generation in these corner regions, albeit with slightly different properties to the physical vortices. This production of vorticity depends only on the presence of a quadratic term in the eddy-viscosity model and not on which particular …
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Multi-scale modeling of laser induced breakdown in non-equilibrium plasmas
… shock strength that decreases with time, until degeneration into a spherical acoustic wave (within a few microseconds). The plasma core decay is driven by a strong vorticity eld that is generated in the ionized gas as a result of a baroclinic torque associated with the misalignment between the …
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Shape change for global vorticity shedding and added mass energy recovery
… to an energetic wake in the case of global vorticity shedding, as well as the recovery of momentum from the wake back to the body in the case of added mass energy recovery. Global vorticity shedding occurs when an object rapidly vanishes from the fluid. A rapid retraction is an approximation …
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Influences of the Darrieus-Landau instability on premixed turbulent flames
… across the flame are also responsible for vorticity destruction and generation in terms of dilatation, vortex stretching and baroclinic torque. In particular, alignments between the vorticity vector, flame surface normal and eigenvectors of the strain rate tensor are used to identify the …
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Flow physics and air interactions of magnetically driven plasma discharges
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-15 without embargo terms