TY - JOUR
T1 - Enstrophy transfers in helical turbulence
AU - Sadhukhan, Shubhadeep
AU - Samuel, Roshan
AU - Plunian, Franck
AU - Stepanov, Rodion
AU - Samtaney, Ravi
AU - Verma, Mahendra Kumar
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): k1052
Acknowledgements: Our numerical simulations have been performed on Shaheen II at the Kaust supercomputing laboratory, Saudi Arabia, under the project k1052. This work was supported by the research grants PLANEX/PHY/2015239 from the Indian Space Research Organisation, India, and by the Department of Science and Technology, India (INT/RUS/RSF/P-03).
PY - 2019/8/28
Y1 - 2019/8/28
N2 - In this paper we study the enstrophy transfers in helical turbulence using direct numerical simulation. We observe that the helicity injection does not have significant effects on the inertial-range energy and helicity spectra (∼k-5/3) and fluxes (constants). We also calculate the separate contributions to enstrophy transfers via velocity-to-vorticity and vorticity-to-vorticity channels. There are four different enstrophy fluxes associated with the former channel or vorticity stretching, and one flux associated with the latter channel or vorticity advection. In the inertial range, the fluxes due to vorticity stretching are larger than that due to advection. These transfers too are insensitive to helicity injection.
AB - In this paper we study the enstrophy transfers in helical turbulence using direct numerical simulation. We observe that the helicity injection does not have significant effects on the inertial-range energy and helicity spectra (∼k-5/3) and fluxes (constants). We also calculate the separate contributions to enstrophy transfers via velocity-to-vorticity and vorticity-to-vorticity channels. There are four different enstrophy fluxes associated with the former channel or vorticity stretching, and one flux associated with the latter channel or vorticity advection. In the inertial range, the fluxes due to vorticity stretching are larger than that due to advection. These transfers too are insensitive to helicity injection.
UR - http://hdl.handle.net/10754/656854
UR - https://link.aps.org/doi/10.1103/PhysRevFluids.4.084607
UR - http://www.scopus.com/inward/record.url?scp=85072020689&partnerID=8YFLogxK
U2 - 10.1103/PhysRevFluids.4.084607
DO - 10.1103/PhysRevFluids.4.084607
M3 - Article
SN - 2469-990X
VL - 4
JO - Physical Review Fluids
JF - Physical Review Fluids
IS - 8
ER -