Histograms of helicity and strain in numerical turbulence

Details Histograms of helicity and strain in numerical turbulence Histograms of helicity and strain in numerical turbulence

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987phrvl..59..783k&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 59, Aug. 17, 1987, p. 783-786. Research supported by the National Center for Atmo

Other

60

Digital Simulation, Helical Flow, Histograms, Strain Rate, Turbulent Flow, Vortices, Eigenvalues, Eigenvectors, Kinetic Energy, Navier-Stokes Equation, Two Dimensional Flow

Scientific paper

Histograms of the normalized values of the helicity and the smallest principal component of the rate of strain are found for one realization of a 128-cubed isotropic simulation of forced turbulence. In regions of high dissipation the strain has a structure indicating sheets. Peak-to-valley ratios in the helicity histograms are less than in other numerical flows, and this ratio decreases further when the helical large scales are filtered or when active regions characterized by the strain are sampled.

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