کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4967669 | 1449381 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A uniquely defined entropy stable matrix dissipation operator for high Mach number ideal MHD and compressible Euler simulations
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A uniquely defined entropy stable matrix dissipation operator for high Mach number ideal MHD and compressible Euler simulations A uniquely defined entropy stable matrix dissipation operator for high Mach number ideal MHD and compressible Euler simulations](/preview/png/4967669.png)
چکیده انگلیسی
We describe a unique averaging procedure to design an entropy stable dissipation operator for the ideal magnetohydrodynamic (MHD) and compressible Euler equations. Often in the derivation of an entropy conservative numerical flux function much care is taken in the design and averaging of the entropy conservative numerical flux. We demonstrate in this work that if the discrete dissipation operator is not carefully chosen as well it can have deleterious effects on the numerical approximation. This is particularly true for very strong shocks or high Mach number flows present, for example, in astrophysical simulations. We present the underlying technique of how to construct a unique averaging technique for the discrete dissipation operator. We also demonstrate numerically the increased robustness of the approximation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 332, 1 March 2017, Pages 274-289
Journal: Journal of Computational Physics - Volume 332, 1 March 2017, Pages 274-289
نویسندگان
Andrew R. Winters, Dominik Derigs, Gregor J. Gassner, Stefanie Walch,