Abstract
Weighted essentially non-oscillatory schemes (WENO) are reconstruction schemes having higher-order and high-resolution properties. This class of schemes can adapt its order based on the smoothness of the solution. The classical fifth-order WENO scheme is a two-level scheme that can achieve fifth-order accuracy for smooth solutions and thirdorder accuracy for non-smooth solutions. However, they cannot achieve fourth-order accuracy. In this work, we propose a threelevel scheme that can achieve third, fourth, and fifth-order accuracies. A new weighing function is introduced for achieving fourth-order accuracy by using the standard substencils of classical WENO schemes. The scheme is tested on variety of 1-D and 2-D problems based on the gas dynamic equations. The proposed scheme exhibit excellent shock resolving property and high computational accuracy. For the shock-shear layer interaction test case, the present scheme found to be five times computationally more economical than the WENO-JS scheme.
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© 2023 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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Neelan, A.G., Chandran, R.J., Diaz, M.A., Bürger, R. (2023). Improved Three-level Order-Adaptive WENO Scheme. In: Bhattacharyya, S., Benim, A.C. (eds) Fluid Mechanics and Fluid Power (Vol. 2). FMFP 2021. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-6970-6_41
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DOI: https://doi.org/10.1007/978-981-19-6970-6_41
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Publisher Name: Springer, Singapore
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Online ISBN: 978-981-19-6970-6
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