Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163937
Title: An efficient algorithm for computing smoothness indicators for WENO schemes
Authors: Vevek, U. S.
Keywords: Engineering::Mechanical engineering
Issue Date: 2021
Source: Vevek, U. S. (2021). An efficient algorithm for computing smoothness indicators for WENO schemes. Journal of Computational Physics, 446, 110619-. https://dx.doi.org/10.1016/j.jcp.2021.110619
Journal: Journal of Computational Physics
Abstract: WENO schemes are a popular class of shock-capturing schemes which adopt an adaptive-stencil approach to interpolation. WENO schemes rely on smoothness indicators to assess the relative smoothness of the solution within the sub-stencils. Computing these smoothness indicators is the most expensive operation in the WENO reconstruction procedure. In this paper, an efficient algorithm is proposed to compute these quantities without sacrificing the positivity property of the smoothness indicators. The proposed algorithm involves linear combinations of the undivided differences which can be computed efficiently in a recursive manner. This allows the computation of the smoothness indicators to be performed using significantly fewer floating-point operations compared to conventional implementations. Moreover, the proposed algorithm is simple to implement and involves fewer constants.
URI: https://hdl.handle.net/10356/163937
ISSN: 0021-9991
DOI: 10.1016/j.jcp.2021.110619
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2021 Elsevier Inc. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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