Filament based plasma

Abstract

Simulation of stellar atmospheres, such as that of our own sun, is a common task in CGI for scientific visualization, movies and games. A fibrous volumetric texture is a visually dominant feature of the solar corona---the plasma that extends from the solar surface into space. These coronal fibers can be modeled as magnetic filaments whose shape is governed by the magnetohydrostatic equation. The magnetic filaments provide a Lagrangian curve representation and their initial configuration can be prescribed by an artist or generated from magnetic flux given as a scalar texture on the sun's surface. Subsequently, the shape of the filaments is determined based on a variational formulation. The output is a visual rendering of the whole sun. We demonstrate the fidelity of our method by comparing the resulting renderings with actual images of our sun's corona.

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Index Terms

• Applied computing

  • Physical sciences and engineering

    • Astronomy

    • Physics

• Computing methodologies

  • Modeling and simulation

    • Simulation types and techniques

      • Scientific visualization

• Mathematics of computing

  • Mathematical analysis

    • Differential equations

      • Partial differential equations