Parallel multiphysics simulation for the stabilized Optimal Transportation Meshfree (OTM) method

Sandeep Kumar (1) , Pierre Gosselet (2) , Dengpeng Huang (3) , Christian Weißenfels (4) , Peter Wriggers (1)

1 Institute of Continuum Mechanics
2 LaMcube - Laboratoire de Mécanique, Multiphysique, Multiéchelle - UMR 9013
3 Institute of Applied Dynamics, Friedrich-Alexander-Universität Erlangen-Nürnberg
4 Institute of Materials Resource Management, Data-driven Computational Materials Science and Engineering, Universität Augsburg

This paper presents a parallel implementation for the Optimal Transportation Meshfree (OTM) method on large CPU clusters. Communications are handled with the Message Passing Interface (MPI). The Recursive Coordinate Bisection (RCB) algorithm is utilized for domain decomposition and for implementing dynamic load-balancing strategy. This work involves three new concepts to reduce the computational efforts: Dynamic halo regions, Efficient data management strategies for ease of addition and deletion of nodes and material points using advanced STL container, and nearest neighborhood communication for detection of neighbors and communication. Also, Linked Cell approach has been implemented to further reduce the computational efforts. Parallel performance analysis is investigated for challenging multiphysics applications like Taylor rod impact and serrated chip formation process. Adequate scalability of parallel implementation for these applications is reported.

Mots clés: Optimal Transportation Meshfree Method Parallel computing MPI Dynamic

Domaines: Mécanique des structures [physics.class-ph]

Sandeep Kumar, Pierre Gosselet, Dengpeng Huang, Christian Weißenfels, Peter Wriggers. Parallel multiphysics simulation for the stabilized Optimal Transportation Meshfree (OTM) method. Journal of computational science, 2022, pp.101739. ⟨10.1016/j.jocs.2022.101739⟩. ⟨hal-03699096⟩