Gelation in coagulation and multiple fragmentation equation with a class of singular rates

TL;DR

This paper investigates the existence of gelation in a complex coagulation and fragmentation model with singular rates, analyzing the conditions under which solutions exist and their long-term behavior.

Contribution

It introduces a novel analysis of gelation in a coagulation-multiple fragmentation equation with singular rates, extending understanding of solution existence and dynamics.

Findings

Proves global existence of weak solutions with gelation under certain conditions.

Analyzes gelation transition in both pure coagulation and combined models.

Demonstrates long-term behavior of solutions in the studied system.

Abstract

In this paper, a partial integro-differential equation modeling of coagulation and multiple fragmentation events is studied. Our purpose is to investigate the global existence of gelling weak solutions to the continuous coagulation and multiple fragmentation equation for a certain class of coagulation rate, linear selection rate and breakage function. Here, the coagulation rate has singularity for small mass (size) and growing as polynomial function of mass for large particles whereas the breakage function attains singularity near the origin. Moreover, a weak fragmentation process is considered for large mass particles to prove this result. The gelation transition is also discussed separately for both Smoluchowski coagulation equation and combined form of coagulation and multiple fragmentation equation. Finally, the long time behavior of solutions of the coagulation and multiple fragmentation is demonstrated.