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Un método numérico híbrido para capturar los choques en leyes de conservación escalares

机译:捕获标量守恒定律中的冲击的混合数值方法

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In this paper we study numerically the approximation of the Cauchy problem for a scalar conservation law by using a mixed technique which combines the principles of finite volume and level sets methods to capture with high-order the entropy solution along discontinuities. The conservation law is approximated by a finite volume scheme of second order that prevents the increase of numerical diffusion on discontinuities by incorporating ghosts states on both sides of the shock curves, which are considered as a implicit curve that is computed via the method of level sets. We present some numerical examples with application of the hybrid method and illustrate the high order accuracy belong to shock curves. Keywords: Discontinuities, Riemann problem, level sets
机译:在本文中,我们使用混合技术对标量守恒定律的柯西问题进行了近似研究,该技术结合了有限体积和水平集方法的原理,以不连续性的高阶熵解进行捕获。守恒律是通过二阶有限体积方案近似的,该方案通过在冲击曲线的两侧合并幻影状态来防止不连续性上的数值扩散增加,这些冲击状态被认为是通过水平集方法计算出的隐式曲线。我们给出了混合方法应用的一些数值例子,并说明了高阶精度属于冲击曲线。关键字:间断性,黎曼问题,水平集

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