A general constitutive model for dense, fine-particle suspensions validated in many geometries
Abstract
Shear-thickening suspensions display peculiar phenomena, exhibiting solid-like and fluid-like behaviors at the same volume fraction. These materials have puzzled researchers since the 1930s and have seen renewed interest due to advances in computational and experimental methods as well as new infrastructural and military applications that might exploit these behaviors. We introduce a continuum model for shear-thickening suspensions, which correctly predicts realistic 3D flows including transient and inhomogeneous cases. Our approach builds the microscopic physics of particle repulsion into a framework for general fluid–grain mixtures, bridging to the fields of geomechanics and granular rheology. Using a material point method routine, we provide a robust model implementation and demonstrate the method’s broader utility for a variety of fluid-particle flow problems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 27, 2019
- Source ID
- 10.1073/pnas.1908065116
Entities
People
- Aaron S. Baumgarten
- Ken Kamrin
Organizations
- Army Research Office
- Massachusetts Institute of Technology
- National Science Foundation