Environmental Risk Assessment and Remediation

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Vortex Stretching

Vortex stretching is at the dominant of the clarification of the turbulence energy cascade from the big scales to the small scales in turbulence. In over-all, in turbulence fluid elements are more lengthened than squeezed, on average. In the end, this outcomes in more vortex stretching than vortex squeezing. For incompressible flow due to size conservation of fluid elements the lengthening implies thinning of the fluid elements in the directions vertical to the stretching direction. This reduces the radial length scale of the assistance vorticity. Lastly, at the small scales of the command of the Kolmogorov microscales, the turbulence kinetic energy is dissolute into heat through the act of molecular viscidness.

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