Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NEMD modeling of nanoscale hydrodynamics of clay-water system at
  elevated temperature   The engineering problems involving clay under non-isothermal conditions
(e.g., geothermal energy harvest, landfill cover system, and nuclear waste
disposal) are multiscale and multiphysics by nature. The nanoscale
hydrodynamics of clay at elevated temperature is essential in developing a
physics-based multiscale model for clay under non-isothermal conditions. The
nonequilibrium molecular dynamics (NEMD) is a useful tool to study the
nanoscale hydrodyndamics of clay. This article presents an NEMD modeling of
hydrodynamics of clay nanopores at elevated temperatures. Water flow confined
in pyrophyllite and montmorillonite clay nanopores is investigated. The
nonequilibrium state is maintained by uniformly exerting an external force on
each water molecule. The NEMD simulations have provided a molecular-scale
perspective of temperature effect on clay-water density, water flow velocity,
shear viscosity, clay-water slip length, hydraulic conductivity, and clay-water
friction coefficient. The numerical results have shown a strong temperature
dependence of fluid flow velocity, shear viscosity, clay-water slip length, and
hydraulic conductivity at the nanoscale. We have validated the applicability of
cubic law in determining hydraulic conductivity at the nanopore scale under at
elevated temperature. It is found from our numerical results that slip
clay-water boundary condition is an essential factor in properly determining
nanoscale fluid flow velocity. By numerical examples, we also study the impact
of nanopore size and clay layer thickness on the hydrodynamics of the
clay-water system.

1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat