3 papers
physics.flu-dyn2026
A closed-form solution for streaming and Lagrangian transport in a deforming circular cavity
Zijian Liu, Julian Olszewski, Yang Lin +3
Streaming from a deforming cavity wall serves micromixing, pumping and particle handling. We solve it in closed form in a two-dimensional circular cavity, for any azimuthal wall mo…
physics.flu-dyn2026
Design of a combined polarimetric and velocimetric measurement for viscoelastic stress, and its constitutive resolving power
Zijian Liu, Julian Olszewski, Bruce I. Gaynes +1
A polarimeter does not report stress. It reports a retardance and an azimuth, and converting those to a stress pair fixes both the calibration that is required and the covariance t…
physics.flu-dyn2026
Structural identifiability and stress reconstruction from incomplete optical maps with velocimetry
Zijian Liu, Julian Olszewski, Bruce I. Gaynes +1
Reconstructing the stress field of a planar viscoelastic flow from optical measurements loses its direct evidence wherever optical coverage is interrupted, and no improvement in op…