کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4967766 1449383 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hybrid entropy stable HLL-type Riemann solvers for hyperbolic conservation laws
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Hybrid entropy stable HLL-type Riemann solvers for hyperbolic conservation laws
چکیده انگلیسی
It is known that HLL-type schemes are more dissipative than schemes based on characteristic decompositions. However, HLL-type methods offer greater flexibility to large systems of hyperbolic conservation laws because the eigenstructure of the flux Jacobian is not needed. We demonstrate in the present work that several HLL-type Riemann solvers are provably entropy stable. Further, we provide convex combinations of standard dissipation terms to create hybrid HLL-type methods that have less dissipation while retaining entropy stability. The decrease in dissipation is demonstrated for the ideal MHD equations with a numerical example.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 330, 1 February 2017, Pages 566-570
نویسندگان
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