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arXiv 1107.0786math.AP
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趋化性:从动力学方程到聚集动力学

Chemotaxis: from kinetic equations to aggregate dynamics

François James, Nicolas Vauchelet

摘要:

研究了一类趋化性动力学模型的流体动力学极限。极限方程是一个非局部的守恒律,有限时间爆破发生,引起测量值的解决方案和不连续的速度。一个适应的概念的对偶解决方案,介绍了线性方程与不连续系数,导致存在的结果。通过非线性通量的精确定义以及集合体的完整动力学,即狄拉克质量的组合,可以获得uniform。最后利用粒子方法构造了一个自适应的数值格式。

英文摘要:

The hydrodynamic limit for a kinetic model of chemotaxis is investigated. The limit equation is a non local conservation law, for which finite time blow-up occurs, giving rise to measure-valued solutions and discontinuous velocities. An adaptation of the notion of duality solutions, introduced for linear equations with discontinuous coefficients, leads to an existence result. Uniqueness is obtained through a precise definition of the nonlinear flux as well as the complete dynamics of aggregates, i.e. combinations of Dirac masses. Finally a particle method is used to build an adapted numerical scheme.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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