Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lasting effects of discontinuous shear thickening in cornstarch
  suspensions upon flow cessation   Dense suspensions that exhibit discontinuous shear thickening (DST) undergo
complex stress relaxation when the flow abruptly stops. Using rotational
rheometry, we study the two-step relaxation of aqueous cornstarch suspensions
out of the DST state upon flow cessation and show that the DST fluid retains
the memory of its shear-thickening state until the shear stress reaches a
constant value at late times. We find that this residual stress at the end of
the relaxation increases with the steady-state viscosity before the cessation.
Furthermore, the timescales that characterize the two-step exponential decay of
the shear stress exhibit near linear dependence on the steady-state viscosity.
Within the current framework that ascribes DST to the breakdown of hydrodynamic
lubrication layers leading to interparticle frictional contacts, the lasting
effects of the steady-state viscosity suggest that the memory of frictional
contacts persists until the end of the relaxation, despite the presence of
repulsive forces between the particles. These results indicate that complete,
spontaneous relaxation of the system out of DST is stalled by the partial
retention of the frictional force chains, which may be caused by the stationary
boundaries and the adhesion between cornstarch particles.

31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex