Abstract
The common defects of the Roe scheme are the non-physical expansion shock and shock instability. By removing the momentum interpolation mechanism (MIM), an improved method with several advantages has been presented to suppress the shock instability. However, it cannot prevent the expansion shock and is incompatible with the traditional curing method for expansion shock. To solve the problem, the traditional curing mechanism is analyzed. Effectiveness of the traditional curing method is discussed, and several defects are identified, one of which leads to incompatibility between curing shock instability and expansion shock. Consequently, an improved Roe scheme is proposed, which is with low computational costs, concise, easy to implement, and robust. More importantly, the proposed scheme can simultaneously solve the problem of shock instability and expansion shock without additional costs.
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Project supported by the National Natural Science Foundation of China (Nos. 51736008 and 51276092)
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Li, X., Ren, X. & Gu, C. Cures for expansion shock and shock instability of Roe scheme based on momentum interpolation mechanism. Appl. Math. Mech.-Engl. Ed. 39, 455–466 (2018). https://doi.org/10.1007/s10483-017-2283-8
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DOI: https://doi.org/10.1007/s10483-017-2283-8