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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X

   
 
 

 

Discretizing advection equations with rough velocity fields on non-Cartesian grids


Authors: Pierre-Emmanuel Jabin and Datong Zhou
Journal: Quart. Appl. Math. 82 (2024), 229-303
MSC (2020): Primary 35F25, 65M12
DOI: https://doi.org/10.1090/qam/1649
Published electronically: March 30, 2023
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Abstract | References | Similar Articles | Additional Information

Abstract: We investigate the properties of discretizations of advection equations on non-Cartesian grids and graphs in general. Advection equations discretized on non-Cartesian grids have remained a long-standing challenge as the structure of the grid can lead to strong oscillations in the solution, even for otherwise constant velocity fields. We introduce a new method to track oscillations of the solution for rough velocity fields on any graph. The method in particular highlights some inherent structural conditions on the mesh for propagating regularity on solutions.


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Additional Information

Pierre-Emmanuel Jabin
Affiliation: Department of Mathematics and Huck Institutes, Pennsylvania State University, State College, PA 16801
MR Author ID: 660988
Email: pejabin@psu.edu

Datong Zhou
Affiliation: Department of Mathematics, Pennsylvania State University, State College, PA 16801
Email: dbz5086@psu.edu

Received by editor(s): November 14, 2022
Received by editor(s) in revised form: December 19, 2022
Published electronically: March 30, 2023
Additional Notes: The authors were partially supported by NSF DMS Grants 2049020, 2219397, and 2205694.
Dedicated: This paper is dedicated to Bob Pego and to the many unique ideas and contributions that he has brought to PDEs and the field of applied math in general.
Article copyright: © Copyright 2023 Brown University