Journal Article

Application of Weighting Direct Simulation Monte Carlo Schemes to Weakly Ionized Rarefied Gas Flows

Bondar, Ye. A., Shevyrin, A. A.

2024

Overview

Procedures of the Direct Simulation Monte Carlo method for weakly ionized flows around reentry vehicles are presented. For ionization and recombination reactions, expressions for the model dependence of the reaction probability on velocities and energies of reagents are derived. An algorithm of dissociative recombination is presented, whose computational efficiency is reached by bypassing the modeling of the interaction of electrons and heavy particles. An approach to the construction of a weighting scheme for elastic collisions and chemical reactions is described, which significantly increases the computational efficiency of the algorithm. An example of using these numerical models and procedures for studying a weakly ionized flow around a reentry capsule under typical reentry co-nditions is given. The computation results are compared to plasma parameters measured in flight experiments.

• Publisher: Pleiades Publishing,Springer Nature B.V
• Subject: Algorithms / Atoms & subatomic particles / Chemical reactions / Computational efficiency / Computational Mathematics and Numerical Analysis / Computer simulation / Direct simulation Monte Carlo method / Elastic scattering / Electrons / Energy / Equilibrium / Gas flow / Mathematical analysis / Mathematical Physics / Mathematics / Mathematics and Statistics / Monte Carlo simulation / Numerical analysis / Numerical models / Plasma / Radiation / Radio communications / Rarefied gases / Reagents / Recombination reactions / Reentry vehicles / Simulation / Software / Vehicles / Weighting