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Abstract <p>This work presents a physico-mathematical model of the processes occurring in an ionized lightning channel formed as a result of a return stroke. The results of numerical simulations are provided, demonstrating that the combined consideration of Joule heating and multigroup radiative transfer leads to the formation of a complex structure in the distributions of the ionized channel parameters. This structure is caused by the presence of two temperature gradients (ahead of the shock front and at the boundary of the conductive region), which arise due to radiative transfer. The obtained results can be used in the development of three-dimensional self-consistent numerical models of lightning channel dynamics.</p>

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Numerical Simulation of Lightning Channel Expansion during the Return Stroke Stage

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • T. V. Losseva,
  • E. M. Urvachev,
  • A. N. Lyakhov

摘要

Abstract

This work presents a physico-mathematical model of the processes occurring in an ionized lightning channel formed as a result of a return stroke. The results of numerical simulations are provided, demonstrating that the combined consideration of Joule heating and multigroup radiative transfer leads to the formation of a complex structure in the distributions of the ionized channel parameters. This structure is caused by the presence of two temperature gradients (ahead of the shock front and at the boundary of the conductive region), which arise due to radiative transfer. The obtained results can be used in the development of three-dimensional self-consistent numerical models of lightning channel dynamics.