Construction of initial vortex-surface fields and Clebsch potentials for flows with high-symmetry using first integrals

ORAL

Abstract

We develop a systematic methodology to construct the explicit, general form of vortex-surface fields (Yang and Pullin, J. Fluid Mech., 661, 2010) and Clebsch potentials based on first integrals of the characteristic equation of a given three-dimensional velocity-vorticity field. This methodology is successfully applied to the initial fields with the zero helicity density and high symmetry, e.g., initial fields with the Taylor-Green and the Kida-Pelz symmetries.

Authors

  • Pengyu He

    • Peking University
  • Yue Yang

    • Peking University
    • State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, China
    • State Key Laboratory for Turbulence and Complex Systems, College of Engineering, Peking University