Two solvable systems of coagulation equations with limited aggregations

Details Two solvable systems of coagulation equations with limited aggregations Two solvable systems of coagulation equations with limited aggregations

2008-06-23

arxiv.org/abs/0806.3677v2

Physics

Mathematical Physics

To appear in : Annales de l' Institut Henri Poincar\'e Analyse Non-lin\'eaire

Scientific paper

We consider two simple models for the formation of polymers where at the initial time, each monomer has a certain number of potential links (called arms in the text) that are consumed when aggregations occur. Loosely speaking, this imposes restrictions on the number of aggregations. The dynamics of concentrations are governed by modifications of Smoluchowski's coagulation equations. Applying classical techniques based on generating functions, resolution of quasi-linear PDE's, and Lagrange inversion formula, we obtain explicit solutions to these non-linear systems of ODE's. We also discuss the asymptotic behavior of the solutions and point at some connexions with certain known solutions to Smoluchowski's coagulation equations with additive or multiplicative kernels.

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