Rheology of periodically sheared suspensions undergoing reversible-irreversible transition
Bibliographic record
Abstract
The rheology of noncolloidal suspensions under cyclic shear is studied numerically. The main findings are a strain amplitude (${\ensuremath{\gamma}}_{0}$) dependent response in the shear stress and second normal stress difference (${N}_{2}$). Specifically, we find a reduced viscosity, an enhanced intracycle shear thinning, the onset of a finite ${N}_{2}$, and its frequency doubling, all near a critical strain amplitude ${\ensuremath{\gamma}}_{c}$ that scales with the volume fraction $\ensuremath{\phi}$ as ${\ensuremath{\gamma}}_{c}\ensuremath{\sim}{\ensuremath{\phi}}^{\ensuremath{-}2}$. These rheological changes also signify a reversible-irreversible transition (RIT), dividing stroboscopic particle dynamics into a reversible absorbing phase (for ${\ensuremath{\gamma}}_{0}<{\ensuremath{\gamma}}_{c}$) and a persistently diffusing phase (for ${\ensuremath{\gamma}}_{0}>{\ensuremath{\gamma}}_{c}$). We explain the results based on two flow-induced mechanisms and elucidate their connection in the context of RIT through the underlying microstructure, which tends toward hyperuniformity near ${\ensuremath{\gamma}}_{0}={\ensuremath{\gamma}}_{c}$. Overall, we expect this correspondence between rheology and emergent dynamics to hold in a wide range of settings where structural organizations are dominated by volume exclusions.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".