Coupling the Monte-Carlo method with semi-analytical solutions of the Boltzmann transport equation

This paper presents an important improvement of the current-based one-particle Monte-Carlo method. By regionwise coupling a semi-analytical solution of the Boltzmann equation to a full solution, the usage of computationally intensive Monte Carlo Boltzmann solvers can be limited to only those regions where they are needed. The advantages and drawbacks of this new method are reviewed and the problems arising from the coupling scheme are discussed.