Dynamic Phase Alignment in Navier-Stokes Turbulence
Journal Article
·
· Physical Review Letters
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Univ. of Wisconsin, Madison, WI (United States)
In Navier-Stokes turbulence, energy and helicity injected at large scales are subject to a joint direct cascade, with both quantities exhibiting a spectral scaling ∝k-5/3. We demonstrate via direct numerical simulations that the two cascades are compatible due to the existence of a strong scale-dependent phase alignment between velocity and vorticity fluctuations, with the phase alignment angle scaling as cosαk∝k-1.
- Research Organization:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Wisconsin, Madison, WI (United States); Univ. of California, Oakland, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
- Grant/Contract Number:
- FG02-91ER54109; SC0018266; AC02-05CH11231; PHY-1654168; PHY-1707272; PHY-2010098; 80NSSC18K0646
- OSTI ID:
- 1980243
- Journal Information:
- Physical Review Letters, Vol. 127, Issue 27; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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