Publications Details

Two-way coupled Lagrangian particles in CTH

Zwick, David

A basic two-way coupled discrete Lagrangian particle method has been implemented into CTH as a proof of concept. The approach has applications in modeling dilute multiphase phenomena, such as dust entrainment or explosive dispersion of debris. Only a basic Stokes drag law was implemented, but the framework allows for more advanced physics to be implemented in the future, such as particle-particle interactions or state of the art drag models. This memo outlines the modifications made to the code to implement the method, along with simple verification problems for it. The particle data structure used was designed to be as general as possible to facilitate future particle based methods being pursued in the future. For example the same data structure could be leveraged for Lagrangian notional particles used in Probability Density Function approaches, or the advection of a distribution of states such as a Weibull distribution for mechanics.