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Filament based plasma

Padilla, Marcel and Gross, Oliver and Knöppel, Felix and Chern, Albert and Pinkall, Ulrich and Schröder, Peter (2022) Filament based plasma. ACM Transactions on Graphics, 41 (4). Art. No. 153. ISSN 0730-0301. doi:10.1145/3528223.3530102.

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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.

Item Type:Article
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Schröder, Peter0000-0002-0323-7674
Additional Information:Publication rights licensed to ACM. ACM acknowledges that this contribution was authored or co-authored by an employee, contractor or affiliate of a national government. As such, the Government retains a nonexclusive, royalty-free right to publish or reproduce this article, or to allow others to do so, for Government purposes only. © 2022 Copyright held by the owner/author(s). Publication rights licensed to ACM. This work was supported in part by the DFG Collaborative Research Center TRR 109 "Discretization in Geometry and Dynamics," the Caltech Center for Information Science & Technology, and the Einstein Foundation Berlin. Additional support was provided by SideFX software. For figures 9, 10, 14, 17, 18, 19, 20, 21, 22 we use freely available lux data from [NASA Solar Dynamics Observatory 2022] as input data. We thank the reviewers for their helpful input.
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG)TRR 109
Caltech Center for Information Science & TechnologyUNSPECIFIED
Einstein Foundation BerlinUNSPECIFIED
Subject Keywords:Magnetohydrostatics, Conformal, Geodesics, Lagrangian modeling, Filament based method
Issue or Number:4
Classification Code:CCS Concepts: Applied computing → Astronomy; Physics; Mathematics of computing → Partial diferential equations; Computing methodologies → Scientiic visualization
Record Number:CaltechAUTHORS:20220726-998094000
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Official Citation:Marcel Padilla, Oliver Gross, Felix Knöppel, Albert Chern, Ulrich Pinkall, and Peter Schröder. 2022. Filament Based Plasma. ACM Trans. Graph. 41, 4, Article 153 (July 2022), 14 pages.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115864
Deposited By: George Porter
Deposited On:27 Jul 2022 20:31
Last Modified:27 Jul 2022 20:31

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