Related Experiment Video
Updated: Jun 8, 2026

The Diffusion of Passive Tracers in Laminar Shear Flow
Published on: May 1, 2018
Explicit finite difference solution of the diffusion equation describing the flow of radon through soil
Svetislav Savović1, Alexandar Djordjevich, Peter W Tse
1City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, China. savovic@kg.ac.rs
Abstract:
Radon diffusion through soil and into air is investigated. The solution of the relevant diffusion equation is given using the explicit finite difference method. Results from a two-medium model (soil-air) are compared to those from a simplified single-medium model (soil alone). The latter are an underestimate in early stages of the diffusion process. Later on, the two models match closely and either one can be used at equilibrium conditions to calculate radon diffusion, estimate indoor radon concentration and assess health hazards.
More Related Videos
Related Concept Videos
Application of Integration: Problem Solving
Linear Differential Equations
Major Losses in Pipes
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
Transmission-Line Differential Equations
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from the...
Partial Differential Equations
Radical Equations

