Towards the efficient modelling of trapped air pockets during squeeze flow

Abstract In most bonding processes, an adhesive is applied to a substrate in specific pattern before the second subsequently pressed against it. During this, flows such way that, ideally, it completely fills joint. practice, however, areas with entrapped air frequently remain bonded layer. Within scope of research project, these are systematically analyzed order identify optimal initial application patterns for and geometry minimise risks. For this purpose, authors use efficient flow model, partially filled gaps model (PFGM), extended study include functionality trapped pockets. Depending on volume fractions adhesive, both phases computed. Therefore, introduced fully described, benchmarked respect its plausibility functionality, results obtained compared CFD calculation. Thereafter, openings closings pockets analyzed. Lastly, then real scenario created Hele–Shaw cell measurement. The benchmark as well comparison measurement show high potential technique.