About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Frontiers in Solidification X
|
| Presentation Title |
New Insights on the Rheology
of Suspensions Containing Spherical or Dendritic-like Structures
|
| Author(s) |
Andreas Ludwig, Mihaela Stefan-Kharicha, Christian Gomes-Rodrigues, Johann Mogeritsch, Abdellah Kharicha, Menghuai Wu |
| On-Site Speaker (Planned) |
Johann Mogeritsch |
| Abstract Scope |
The relation of shear viscosity and solid fraction is a crucial input for volume-averaged multiphase solidification simulations. Current models often rely on the random close packing limit of equally sized spheres. This study focuses on understanding how the shape of solid particles influences the rheology of suspensions. We investigated the shear viscosity and normalized viscosity of suspensions containing particles with shapes ranging from spheres to dendritic-like structures composed of six pyramids. To achieve this, a custom-designed shear cell was developed and successfully integrated into a commercial rheometer. The measured relationships between shear rate, momentum, normal force, and volume fraction will be presented and discussed.
In parallel a standard volume-averaged two-phase simulation was extended, to account for particle pressure and applied it to the rheometer process. Our findings reveal that the suspension dynamics within the rheometer are highly sensitive to the drag law considered and more complex than assumed in literature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Solidification, Other |