Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-scale evolution during shear reversal in dense suspensions   We use shear reversal simulations to explore the rheology of dense,
non-Brownian suspensions, resolving lubrication forces between neighbouring
particles and modelling particle surface contacts. The transient stress
response to an abrupt reversal of the direction of shear shows
rate-independent, nonmonotonic behaviour, capturing the salient features of the
corresponding classical experiments. Based on analyses of the hydrodynamic and
particle contact stresses and related contact networks, we demonstrate distinct
responses at small and large strains, associated with contact breakage and
structural re-orientation, respectively, emphasising the importance of particle
contacts. Consequently, the hydrodynamic and contact stresses evolve over
disparate strain scales and with opposite trends, resulting in nonmonotonic
behaviour when combined. We further elucidate the roles of particle roughness
and repulsion in determining the microstructure and hence the stress response
at each scale.

11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int