Enstrophy

From AMS Glossary
Revision as of 17:09, 20 February 2012 by Perlwikibot (Talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search


enstrophy

One-half the square of the relative vorticity.

The term was popularized by C. Leith and is based on the modern Greek στρωφη, meaning "act of turning." Enstrophy is a conservative quantity in two-dimensional inviscid flow. However, when viscosity is finite, enstrophy tends to be selectively decayed relative to more rugged integrals such as energy and angular momentum.

Leith, C. E. 1968. Diffusion approximation for two-dimensional turbulence. Phys. Fluids. 11. 671–673.

Personal tools
Namespaces
Variants