Bidirectional Coupling of the Direct Simulation Monte Carlo Method with a Particle-Based Continuum Method

• Applicant: Professor Dr.-Ing. Stefanos Fasoulas
• Subject Area: Fluid Mechanics
• Term: from 2013 to 2019
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 242915735

The coupling of the two particle methods DSMC and LD shall be further developed and investigated within this proposed follow-up project. This novel particle-based simulation method enables the numerical investigation of three-dimensional, and chemically reactive flows including friction with large differences in the local density (local Knudsen number). The engineering goal is to validate the LD-DSMC method as an efficient, viable solution possibility of multiscale problems and thus contribute to a better multiscale understanding of gas flow phenomena. The hybrid particle method was successfully implemented during the first funding phase in the particle code PICLas which arose in the context of various DFG projects and is also further developed in parallel. The development of the LD-DSMC method up to now has shown that new methods for time and particle discretisation are necessary to increase efficiency. Also, the physical modeling in the LD method must be extended for the treatment of gas mixtures. This novel modeling aspects will have a significant impact on the performance of the coupled LD- DSMC method, which is to be investigated by a corresponding evaluation of the method, especially when compared to other simulation methods.

• DFG Programme: Research Grants