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