Solitary wave solutions to higher-order traffic flow model with large diffusion

Solitary wave solutions to higher-order traffic flow model with large diffusion
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大扩散高阶交通流模型的孤立波解

DOI:
10.1007/s10483-014-1781-x
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发表时间:
2014-01
期刊:
Applied Mathematics and Mechanics (English Edition )
影响因子:
--
通讯作者:
Choi, Kee-choo
Choi, Kee-choo
中科院分区:
其他
文献类型:
--
作者:
Zhang, Peng;Wong, S. C.;Qiao, Dian-liang;Choi, Kee-choo

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本文利用泰勒展开式求出了一个具有足够大扩散的高阶交通流模型的KDV近似解。证明了考虑所有相关参数的KdV近似解的有效性,以确保解的物理有界性和稳定性。此外,当粘性系数取决于流动的密度和速度时,KdV解的波速自然与第一或第二特征场有关。将有限元方法推广到求解该模型,并对KdV近似解的稳定性和精度进行了检验。
This paper uses the Taylor expansion to seek an approximate Kortewegde Vries equation (KdV) solution to a higher-order traffic flow model with sufficiently large diffusion. It demonstrates the validity of the approximate KdV solution considering all the related parameters to ensure the physical boundedness and the stability of the solution. Moreover, when the viscosity coefficient depends on the density and velocity of the flow, the wave speed of the KdV solution is naturally related to either the first or the second characteristic field. The finite element method is extended to solve the model and examine the stability and accuracy of the approximate KdV solution.
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