Year: 2008
Type: article
Abstract: We study the dynamics of a radioactive species flowing through a porous material, within the continuous-time random-walk (CTRW) approach to the modeling of stochastic transport processes. Emphasis is given to the case where radioactive decay is coupled to anomalous diffusion in locally heterogeneous media, such as porous sediments or fractured rocks. In this framework, we derive the distribution of the number of jumps each particle can perform before a decay event. On the basis of the obtained results, we compute the moments of the cumulative particle distribution, which can be then used to quantify the overall displacement and spread of the contaminant species.
Source: Physical Review E
Author: A. Zoia
Institution: Politecnico di Milano
Language: English
Subfield: Modeling and Simulation
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1978727666