The 4th symposium on two-phase modeling for sediment dynamics in geophysical flows was held in Newark, Delaware from September 17-19, 2019. The conference theme was to “bridge terrestrial, coastal and marine surface dynamics with multiphase flows” enabling improved prediction of these complicated, intermingled processes. Coastal processes contain challenging multi-scale problems that require tight integration between theory, physical/numerical models and in situ data. The two-phase flow approach is essential to understanding and modeling these complex processes.

The conference had over 60 attendees from 13 countries and over 50 presentations. Professors Peter Nielsen and Sivaramakrishnan Balachandar gave keynote presentations. Numerous young researchers were in attendance demonstrating a thriving research community and that we are cultivating the future leaders in our fields. Professors Bonamy and Chauchat provided a SedFoam workshop.

The Local Organizing Committee consisted of Tom Hsu (Leader), Jim Kirby, Joe Calantoni, Lian Ping Wang, Fabrice Veron, Tobias Kukulka and Jack Puleo. Thanks also to Christine Murray from the University of Delaware.