Development and validation of a DSMC method for industrial application

This document present the work done for my master thesis during 6 month in OHB. The implementation of a DSMC (Direct Simulation Monte Carlo) method had been successful in order to run plume impingement simulations on complex geometries. A Navier-Stokes solver was used to derive the flow in the continuum regime, and this flow was inserted in a DSMC solver in order to derive the rest of the flow in the simulation domain. Many scripts were developed for this use, in order to make the interfacing between the two solvers functional. The implementation being successful, this method has been validated thanks to simulation comparison but also by confronting simulations with experimental data. The results obtained showed a 50% gain in accuracy with respect to the method used previously (were DSMC was not employed). Moreover, realistic simulations showed a deviation of only 20% with respect to experimental data. This method has then been employed to study two industrial cases also presented in this document.