Modeling and optimization of the delivery fluctuation of gear pumps Efstratios Tsolakis, Antonios Tzanopoulos, Georgios Vasileiou, Nikolaos Rogkas, Vasilios Spitas and Pavlos Zalimidis MATEC Web Conf., 287 (2019) 01012 Published online: 14 August 2019 DOI: 10.1051/matecconf/201928701012