A Multidimensional Radiation Magnetohydrodynamics Code Based on Flux-Limited Diffusion and HLLD

Yang Xiaohong; Yuan Feng

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A Multidimensional Radiation Magnetohydrodynamics Code Based on Flux-Limited Diffusion and HLLD

机译：基于磁通量有限扩散和HLLD的多维辐射磁流体动力学代码

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Wepresentamultidimensionalradiationmagnetohydrodynamics(MHD)codebasedonthehigh-resolutionshockcapturingschemes(HRSC),theflux-limiteddiffusion(FLD)approximation,andtheassumptionoflocalthermodynamicequilibrium(LTE).TheHRSC,employingaconservativealgorithmthataccuratelyensuresconservationofthetotalenergyofMHDisimplementedusingathird-orderRunge-KutteschemeandtheHLLDRiemannsolver.IntheFLDapproximation,becausetheevolutionequationsoftheradiationenergyfluxareneglected,thiscodeiseasilyimplemented,thoughtheFLDapproximationislessaccuratewhendealingwithhighlyanisotropicradiationfieldsinanopticallythinregion.WecarriedoutclassicaltestsfortheMHDandforthesubcriticalandsupercriticalradiatingshocks.Theresultsshowthatthiscodecanachievethenecessaryaccuracyandefficiencytosolvetheradiation-dominatedastrophysicalprocesseswiththeFLDapproximation.

机译：Wepresentamultidimensionalradiationmagnetohydrodynamics（MHD）codebasedonthehigh-resolutionshockcapturingschemes（HRSC），theflux-limiteddiffusion（FLD）近似，andtheassumptionoflocalthermodynamicequilibrium（LTE）.TheHRSC，employingaconservativealgorithmthataccuratelyensuresconservationofthetotalenergyofMHDisimplementedusingathird-orderRunge-KutteschemeandtheHLLDRiemannsolver.IntheFLDapproximation，becausetheevolutionequationsoftheradiationenergyfluxareneglected，thiscodeiseasilyimplemented，thoughtheFLDapproximationislessaccuratewhendealingwithhighlyanisotropicradiationfieldsinanopticallythinregion.WecarriedoutclassicaltestsfortheMHDandforthesubcriticalandsupercriticalradiatingshocks.Theresultsshowthatthiscodecanachievethenecessaryaccuracyandefficiencytosolvetheradiation-dominatedastrophysicalprocesseswiththeFLDapproximation。

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《PASJ: Publications of the Astronomical Society of Japan》 |2012年第4期|共页
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Yang Xiaohong; Yuan Feng;
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7. A Multidimensional Radiation Magnetohydrodynamics Code Based on Flux-Limited Diffusion and HLLD [O] . Xiaohong Yang, Feng Yuan 2012

机译：基于通量有限扩散和HLLD的多维辐射磁力学码

A Multidimensional Radiation Magnetohydrodynamics Code Based on Flux-Limited Diffusion and HLLD

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