Submitted by DI Daniel Queteschiner Submitted at Department of Particu- late Flow Modelling Supervisor and First Examiner Priv.-Doz. Dr. Simon Schneiderbauer Second Examiner Prof. Dr. ir. Niels Deen Co-Supervisors Assoz. Univ.-Prof. Dr. Stefan Pirker DI Dr. Thomas Lichtenegger February 2020 JOHANNES KEPLER UNIVERSITY LINZ Altenbergerstraße 69 4040 Linz, Austria www.jku.at DVR 0093696 Discrete Element Method: Adaptive Resolution Simula- tions of Granular Flows for Large-Scale Systems Doctoral Thesis to obtain the academic degree of Doktor der technischen Wissenschaften in the Doctoral Program Technische Wissenschaften