TY - JOUR
T1 - Simulation of vortex reconnection
AU - Kerr, Robert M.
AU - Hussain, Fazle
N1 - Funding Information:
~,lvil,~ ,~,~,uuwl~ug~ support of ARO MiPR No. 129-87 at the National Center for Atmospheric Research. NCAR is funded by the Na- tional Science Foundation. FH acknowledges support of DOE Grant No. DE-FG05-88ER13839. Computing assistance from D. Virk is appreciated.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1989/7
Y1 - 1989/7
N2 - The reconnection of two antiparallel viscous vortices is simulated in a periodic domain. Reynolds numbers based on circulation divided by viscosity range from 1600 to 3200. Symmetries are used along with increased resolution in the direction normal to the dividing plane to reduce the computation requirements. As the Reynolds number is increased a significant increase in enstrophy is not seen, but there is a significant increase in the peak vorticity that is consistent with a singularity of the three-dimensional, incompressible Euler equations in a finite time. The reconnection region is characterized by vortex sheets and large relative helicity in the outer regions of the reconnection. A power law regime is found in energy spectra.
AB - The reconnection of two antiparallel viscous vortices is simulated in a periodic domain. Reynolds numbers based on circulation divided by viscosity range from 1600 to 3200. Symmetries are used along with increased resolution in the direction normal to the dividing plane to reduce the computation requirements. As the Reynolds number is increased a significant increase in enstrophy is not seen, but there is a significant increase in the peak vorticity that is consistent with a singularity of the three-dimensional, incompressible Euler equations in a finite time. The reconnection region is characterized by vortex sheets and large relative helicity in the outer regions of the reconnection. A power law regime is found in energy spectra.
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U2 - 10.1016/0167-2789(89)90151-6
DO - 10.1016/0167-2789(89)90151-6
M3 - Article
AN - SCOPUS:0024704321
VL - 37
SP - 474
EP - 484
JO - Physica D: Nonlinear Phenomena
JF - Physica D: Nonlinear Phenomena
SN - 0167-2789
IS - 1-3
ER -