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An existence result on weak solutions to the continuous coagulation equation with collision-induced multiple fragmentation is established for certain classes of unbounded coagulation, collision and breakup kernels. In this model, a pair of…

偏微分方程分析 · 数学 2018-02-27 Prasanta Kumar Barik , Ankik Kumar Giri

The article presents the existence and mass conservation of solution for the discrete Safronov-Dubovski coagulation equation for the product coalescence coefficients $\phi$ such that $\phi_{i,j} \leq ij$ $\forall$ $i,j \in \mathbb{N}$. Both…

偏微分方程分析 · 数学 2022-07-28 Sonali Kaushik , Rajesh Kumar

We consider self-similar solutions with finite mass to Smoluchowski's coagulation equation for rate kernels that have homogeneity zero but are possibly singular such as Smoluchowski's original kernel. We prove pointwise exponential decay of…

偏微分方程分析 · 数学 2013-10-18 Barbara Niethammer , Juan J. L. Velazquez

Existence and uniqueness of mass-conserving classical solutions to the continuous coagulation equation with collisional breakage are investigated for an unbounded class of collision kernels and a particular case of the distribution…

偏微分方程分析 · 数学 2018-08-23 Prasanta Kumar Barik , Ankik Kumar Giri

We characterize the long-time behaviour of solutions to Smoluchowski's coagulation equation with a diagonal kernel of homogeneity $\gamma < 1$. Due to the property of the diagonal kernel, the value of a solution depends only on a discrete…

偏微分方程分析 · 数学 2016-08-11 Philippe Laurençot , Barbara Niethammer , Juan J. L. Velázquez

We show the existence of self-similar solutions with fat tails for Smoluchowski's coagulation equation for homogeneous kernels satisfying $C_1 \left(x^{-a}y^{b}+x^{b}y^{-a}\right)\leq K\left(x,y\right)\leq…

偏微分方程分析 · 数学 2014-11-07 Barbara Niethammer , Sebastian Throm , Juan J. L. Velázquez

The existence of self-similar solutions with fat tails for Smoluchowski's coagulation equation has so far only been established for the solvable and the diagonal kernel. In this paper we prove the existence of such self-similar solutions…

偏微分方程分析 · 数学 2015-06-03 Barbara Niethammer , Juan J. L. Velazquez

We consider Smoluchowski's coagulation equation in the case of the diagonal kernel with homogeneity $\gamma>1$. In this case the phenomenon of gelation occurs and solutions lose mass at some finite time. The problem of the existence of…

偏微分方程分析 · 数学 2018-12-14 Marco Bonacini , Barbara Niethammer , Juan Velázquez

Existence and non-existence of integrable stationary solutions to Smoluchowski's coagulation equation with source are investigated when the source term is integrable with an arbitrary support in (0, $\infty$). Besides algebraic upper and…

偏微分方程分析 · 数学 2020-06-30 Philippe Laurençot

In this paper we prove that the time dependent solutions of a large class of Smoluchowski coagulation equations for multicomponent systems concentrate along a particular direction of the space of cluster compositions for long times. The…

偏微分方程分析 · 数学 2024-10-02 Marina A. Ferreira , Jani Lukkarinen , Alessia Nota , Juan J. L. Velázquez

The existence of weak solutions to the continuous coagulation equation with multiple fragmentation is shown for a class of unbounded coagulation and fragmentation kernels, the fragmentation kernel having possibly a singularity at the…

偏微分方程分析 · 数学 2011-01-24 Ankik Kumar Giri , Philippe Laurencot , Gerald Warnecke

We show that solutions to Smoluchowski's equation with a constant coagulation kernel and an initial datum with some regularity and exponentially decaying tail converge exponentially fast to a self-similar profile. This convergence holds in…

偏微分方程分析 · 数学 2010-02-02 José Alfredo Cañizo , Stéphane Mischler , Clément Mouhot

In this article we correct the proof of a uniqueness result for self-similar solutions to Smoluchowski's coagulation equation for kernels $K=K(x,y)$ that are homogeneous of degree zero and close to constant in the sense that…

偏微分方程分析 · 数学 2017-06-28 Barbara Niethammer , Sebastian Throm , Juan J. L. Velázquez

We establish nearly optimal rates of convergence to self-similar solutions of Smoluchowski's coagulation equation with kernels $K = 2$, $x + y$, and $xy$. The method is a simple analogue of the Berry-Ess\'een theorem in classical…

适应与自组织系统 · 物理学 2011-04-26 Ravi Srinivasan

We prove uniqueness of measure solutions for a multi-component version of Smoluchowski's coagulation equation. The result is valid for a broad range of coagulation kernels and allows to include a source term. The classical coagulation…

偏微分方程分析 · 数学 2023-06-21 Sebastian Throm

The existence and uniqueness of weak solutions to a size-structured growth-coagulation-fragmentation (GCF) equation with a renewal boundary condition are shown for a class of unbounded coagulation and fragmentation kernels. The existence…

偏微分方程分析 · 数学 2025-04-09 Saroj Si , Ankik Kumar Giri

We study the similarity solutions (SS) of Smoluchowski coagulation equation with multiplicative kernel $K(x,y)=(xy)^{s}$ for $s<\frac{1}{2}$. When $s<0$% , the SS consists of three regions with distinct asymptotic behaviours. The…

数学物理 · 物理学 2022-12-27 G. Breschi , M. A. Fontelos

The present paper deals with the existence and uniqueness of global classical solutions to the continuous coagulation and nonlinear multiple fragmentation equations for large classes of unbounded coagulation, collision and breakup kernels.…

偏微分方程分析 · 数学 2018-02-27 Prasanta Kumar Barik , Ankik Kumar Giri

We construct a time-dependent solution to the Smoluchowski coagulation equation with a constant flux of dust particles entering through the boundary at zero. The dust is instantaneously converted into particles and flux solutions have…

偏微分方程分析 · 数学 2024-12-11 Marina A. Ferreira , Aleksis Vuoksenmaa

We study the long-time behaviour of the solutions to Smoluchowski coagulation equations with a source term of small clusters. The source drives the system out-of-equilibrium, leading to a rich range of different possible long-time…