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- Vortex_stretching abstract "In fluid dynamics, vortex stretching is the lengthening of vortices in three-dimensional fluid flow, associated with a corresponding increase of the component of vorticity in the stretching direction—due to the conservation of angular momentum.Vortex stretching is associated with a particular term in the vorticity equation. For example, vorticity transport in an incompressible inviscid flow is governed bywhere D/Dt is the convective derivative. The source term on the right hand side is the vortex stretching term. It amplifies the vorticity when the velocity is diverging in the direction parallel to .A simple example of vortex stretching in a viscous flow is provided by the Burgers vortex.Vortex stretching is at the core of the description of the turbulence energy cascade from the large scales to the small scales in turbulence. In general, in turbulence fluid elements are more lengthened than squeezed, on average. In the end, this results in more vortex stretching than vortex squeezing. For incompressible flow—due to volume conservation of fluid elements—the lengthening implies thinning of the fluid elements in the directions perpendicular to the stretching direction. This reduces the radial length scale of the associated vorticity. Finally, at the small scales of the order of the Kolmogorov microscales, the turbulence kinetic energy is dissipated into heat through the action of molecular viscosity.".
- Vortex_stretching thumbnail Studies_of_Water_passing_Obstacles_and_falling.jpg?width=300.
- Vortex_stretching wikiPageID "22586949".
- Vortex_stretching wikiPageRevisionID "589659271".
- Vortex_stretching hasPhotoCollection Vortex_stretching.
- Vortex_stretching subject Category:Fluid_dynamics.
- Vortex_stretching subject Category:Turbulence.
- Vortex_stretching comment "In fluid dynamics, vortex stretching is the lengthening of vortices in three-dimensional fluid flow, associated with a corresponding increase of the component of vorticity in the stretching direction—due to the conservation of angular momentum.Vortex stretching is associated with a particular term in the vorticity equation. For example, vorticity transport in an incompressible inviscid flow is governed bywhere D/Dt is the convective derivative.".
- Vortex_stretching label "Vortex stretching".
- Vortex_stretching sameAs m.05zn601.
- Vortex_stretching sameAs Q7941936.
- Vortex_stretching sameAs Q7941936.
- Vortex_stretching wasDerivedFrom Vortex_stretching?oldid=589659271.
- Vortex_stretching depiction Studies_of_Water_passing_Obstacles_and_falling.jpg.
- Vortex_stretching isPrimaryTopicOf Vortex_stretching.
