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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…

Analysis of PDEs · Mathematics 2024-12-11 Marina A. Ferreira , Aleksis Vuoksenmaa

In this paper we study the fundamental solution of the equation obtained by the linearisation of the Smoluchowski coagulation equation with the multiplicative kernel $(x y)^{\lambda/2}$ with $\lambda\in (1, 2)$ around the steady state…

Mathematical Physics · Physics 2009-11-09 M. Escobedo , J. J. L. Velazquez

Gelation in the Smoluchowski coagulation equation is commonly interpreted as a finite-time singularity marked by mass loss or moment divergence. We instead characterize gelation as a loss of dynamical stability of the Smoluchowski flow,…

Soft Condensed Matter · Physics 2026-01-28 Manuel Dedola , Ludovico Cademartiri

We study the solutions of the Smoluchowski coagulation equation with a regularisation term which removes clusters from the system when their mass exceeds a specified cut-off size, M. We focus primarily on collision kernels which would…

Statistical Mechanics · Physics 2013-05-29 Robin C. Ball , Colm Connaughton , Thorwald H. M. Stein , Oleg Zaboronski

Sufficient conditions are given for existence and uniqueness in Smoluchowski's coagulation equation, for a wide class of coagulation kernels and initial mass distributions. An example of non-uniqueness is constructed. The stochastic…

Probability · Mathematics 2007-05-23 James R. Norris

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…

Analysis of PDEs · Mathematics 2020-06-30 Philippe Laurençot

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…

Analysis of PDEs · Mathematics 2013-10-18 Barbara Niethammer , Juan J. L. Velazquez

In this article we prove the existence of solutions to the coagulation equation with singular kernels. We use weighted L^1-spaces to deal with the singularities in order to obtain regular solutions. The Smoluchowski kernel is covered by our…

Mathematical Physics · Physics 2014-01-22 Carlos Cueto Camejo , Robin Gröpler , Gerald Warnecke

Global weak solutions to the continuous Smoluchowski coagulation equation (SCE) are constructed for coagulation kernels featuring an algebraic singularity for small volumes and growing linearly for large volumes, thereby extending previous…

Analysis of PDEs · Mathematics 2018-04-04 Prasanta Kumar Barik , Ankik Kumar Giri , Philippe Laurençot

Uniqueness of mass-conserving self-similar solutions to Smoluchowski's coagulation equation is shown when the coagulation kernel $K$ is given by $K(x,x\_*)=2(x x\_*)^{-\alpha}$, $(x,x\_*)\in (0,\infty)^2$, for some $\alpha>0$.

Analysis of PDEs · Mathematics 2018-04-18 Philippe Laurençot

This article is devoted to a generalized version of Smoluchowski's coagulation equation. This model describes the time evolution of a system of aggregating particles under the effect of external input and output particles. We show that for…

Analysis of PDEs · Mathematics 2023-06-16 Prasanta Kumar Barik , Asha K. Dond , Rakesh Kumar

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…

Mathematical Physics · Physics 2022-12-27 G. Breschi , M. A. Fontelos

In this article we study an extension of Smoluchowski's discrete coagulation equation, where particle in- and output takes place. This model is frequently used to describe aggregation processes in combination with sedimentation of clusters.…

Mathematical Physics · Physics 2018-01-10 Christian Kuehn , Sebastian Throm

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…

Mathematical Physics · Physics 2023-05-29 Marina A. Ferreira , Eugenia Franco , Jani Lukkarinen , Alessia Nota , Juan J. L. Velázquez

In this article we prove the existence of solutions to the singular coagulation equation with multifragmentation. We use weighted $L^1$-spaces to deal with the singularities and to obtain regular solutions. The Smoluchowski kernel is…

Mathematical Physics · Physics 2013-10-30 Carlos Cueto Camejo , Gerald Warnecke

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…

Analysis of PDEs · Mathematics 2015-06-03 Barbara Niethammer , Juan J. L. Velazquez

We show that models for homogeneous and heterogeneous nucleation of D-dimensional droplets in a d-dimensional medium are described in mean-field by a modified Smoluchowski equation for the distribution N(s,t) of droplets masses s, with…

Statistical Mechanics · Physics 2009-10-30 Stephane Cueille , Clement Sire

We derive a satisfying rate of convergence of the Marcus-Lushnikov process toward the solution to Smoluchowski's coagulation equation. Our result applies to a class of homogeneous-like coagulation kernels with homogeneity degree ranging in…

Probability · Mathematics 2011-03-10 Eduardo Cepeda , Nicolas Fournier

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…

Analysis of PDEs · Mathematics 2014-11-07 Barbara Niethammer , Sebastian Throm , Juan J. L. Velázquez

We consider mass-conserving self-similar solutions of Smoluchowski's coagulation equation with multiplicative kernel of homogeneity $2l\lambda \in (0,1)$. We establish rigorously that such solutions exhibit a singular behavior of the form…

Analysis of PDEs · Mathematics 2011-02-14 Barbara Niethammer , Juan J. L. Velazquez