Meshfree based multiresolution solver for PDEs with large gradients

Alfonso Limon; Hedley Morris

doi:10.1117/12.735051

17 September 2007 Meshfree based multiresolution solver for PDEs with large gradients

Alfonso Limon, Hedley Morris

Proceedings Volume 6700, Mathematics of Data/Image Pattern Recognition, Compression, Coding, and Encryption X, with Applications; 670007 (2007) https://doi.org/10.1117/12.735051
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

We introduce a multilevel PDE solver for equations whose solutions exhibit large gradients. Expanding on Ami Harten's ideas, we construct an alternative to wavelet-based grid refinement, a multiresolution coarsening method capable of capturing sharp gradients across different scales and thus improving PDE-based simulations by concentrating computational resources in places where the solution varies sharply. Our scheme is akin to Finite Differences in that it computes derivatives explicitly and then uses the derivative information to march the solution in time. However, we utilize meshfree methods to compute derivatives and integrals in space-time to increase the robustness of our solver and tailor the basis functions to the Kd-tree structure provided by the multiresolution analysis.

Citation Download Citation

Alfonso Limon and Hedley Morris "Meshfree based multiresolution solver for PDEs with large gradients", Proc. SPIE 6700, Mathematics of Data/Image Pattern Recognition, Compression, Coding, and Encryption X, with Applications, 670007 (17 September 2007); https://doi.org/10.1117/12.735051

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