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Lax-Friedrich Scheme for the Numerical Simulation of a Traffic Flow Model Based on a Nonlinear Velocity Density Relation

机译:基于非线性速度密度关系的交通流模型数值模拟的Lax-Friedrich方案

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A fluid dynamic traffic flow model based on a non-linear velocity-density function is considered. The model provides a quasi-linear first order hyperbolic partial differential equation which is appended with initial and boundary data and turns out an initial boundary value problem (IBVP). A first order explicit finite difference scheme of the IBVP known as Lax-Friedrich’s scheme for our model is presented and a well-posedness and stability condition of the scheme is established. The numerical scheme is implemented in order to perform the numerical features of error estimation and rate of convergence. Fundamental diagram, density, velocity and flux profiles are presented.
机译:考虑基于非线性速度-密度函数的流体动态交通流模型。该模型提供了一个准线性一阶双曲偏微分方程,该方程附加了初始和边界数据,并得出了初始边界值问题(IBVP)。提出了IBVP的一阶显式有限差分方案,即我们模型的Lax-Friedrich方案,并建立了该方案的适定性和稳定性条件。实施数值方案是为了执行误差估计和收敛速度的数值特征。给出了基本图,密度,速度和通量分布图。

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