Displaying items by tag: Aggregation
First-order aggregation models with alignment
Razvan C. Fetecau, Weiran Sun, and Changhui Tan
Physica D: Nonlinear Phenomena, Volume 325, pp. 146-163 (2016).
Abstract
We include alignment interactions in a well-studied first-order attractive–repulsive macroscopic model for aggregation. The distinctive feature of the extended model is that the equation that specifies the velocity in terms of the population density, becomes implicit, and can have non-unique solutions. We investigate the well-posedness of the model and show rigorously how it can be obtained as a macroscopic limit of a second-order kinetic equation. We work within the space of probability measures with compact support and use mass transportation ideas and the characteristic method as essential tools in the analysis. A discretization procedure that parallels the analysis is formulated and implemented numerically in one and two dimensions.
doi:10.1016/j.physd.2016.03.011 | |
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