AN ASYMPTOTIC PRESERVING SCHEME FOR KINETIC MODELS WITH SINGULAR LIMIT

作者：Chertock Alina^*; Tan Changhui; Yan Bokai

来源：Kinetic and Related Models, 2018, 11(4): 735-756.

DOI：10.3934/krm.2018030

• Kinetic models
• singular limit
• asymptotic-preserving schemes
• velocity scaling
• aggregation equation
• flocking phenomena

We propose a new class of asymptotic preserving schemes to solve kinetic equations with mono-kinetic singular limit. The main idea to deal with the singularity is to transform the equations by appropriate scalings in velocity. In particular, we study two biologically related kinetic systems. We derive the scaling factors, and prove that the rescaled solution does not have a singular limit, under appropriate spatial non-oscillatory assumptions, which can be verified numerically by a newly developed asymptotic preserving scheme. We set up a few numerical experiments to demonstrate the accuracy, stability, efficiency and asymptotic preserving property of the schemes.

• 出版日期2018-8