arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1801.08770math.AP
收藏

具有非线性迁移率的非局部输运方程的确定性粒子近似

Deterministic particle approximation for nonlocal transport equations with nonlinear mobility

M. Di Francesco, S. Fagioli, E. Radici

摘要:

我们构建了一个确定性的,拉格朗日多粒子近似的一类非局部运输偏微分方程的非线性流动性在生物学和社会科学的许多情况下产生的。近似粒子系统是跟随领导者方案的非局部版本。我们严格证明了一个合适的离散逐段密度重建的粒子计划强烈收敛于$L^1_{loc}$对唯一的熵解的目标PDE的粒子数趋于无穷大。证明是基于均匀BV估计的近似序列和验证的近似版本的熵条件的大量粒子。作为证明的一部分,我们还证明了熵解的唯一性。我们还提供了一个具体的例子,弱解的非唯一性和讨论的相互作用的熵条件与稳定状态。最后,我们产生数值模拟支持的熵解的概念的需要,以得到一个适定的半群在连续极限,并显示大的时间的解决方案的行为。

英文摘要:

We construct a deterministic, Lagrangian many-particle approximation to a class of nonlocal transport PDEs with nonlinear mobility arising in many contexts in biology and social sciences. The approximating particle system is a nonlocal version of the follow-the-leader scheme. We rigorously prove that a suitable discrete piece-wise density reconstructed from the particle scheme converges strongly in $L^1_{loc}$ towards the unique entropy solution to the target PDE as the number of particles tends to infinity. The proof is based on uniform BV estimates on the approximating sequence and on the verification of an approximated version of the entropy condition for large number of particles. As part of the proof, we also prove uniqueness of entropy solutions. We also provide a specific example of non-uniqueness of weak solutions and discuss about the interplay of the entropy condition with the steady states. Finally, we produce numerical simulations supporting the need of a concept of entropy solution in order to get a well-posed semigroup in the continuum limit, and showing the behaviour of solutions for large times.

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。

↑