کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4967228 1449364 2017 28 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Second-order accurate genuine BGK schemes for the ultra-relativistic flow simulations
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
Second-order accurate genuine BGK schemes for the ultra-relativistic flow simulations
چکیده انگلیسی
This paper presents second-order accurate genuine BGK schemes in the framework of finite volume method for the ultra-relativistic flows. Different from the existing kinetic flux-vector splitting (KFVS) or BGK-type schemes for the ultra-relativistic Euler equations, the present schemes are derived from the analytical solution of the Anderson-Witting model, which is given for the first time and includes the “genuine” particle collisions in the gas transport process. The proposed schemes for the ultra-relativistic viscous flows are also developed and two examples of ultra-relativistic viscous flow are designed. Several 1D and 2D numerical experiments are conducted to demonstrate that the proposed schemes not only are accurate and stable in simulating ultra-relativistic inviscid and viscous flows, but also have higher resolution at the contact discontinuity than the KFVS or BGK-type schemes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 349, 15 November 2017, Pages 300-327
نویسندگان
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