Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tetrahedrality, hydrogen bonding and the density anomaly of the central
  force water model. A Monte Carlo study   Monte Carlo computer simulations in the canonical and grand canonical
statistical ensemble were used to explore the properties of the central force
(CF1) water model. The intramolecular structure of the H$_2$O molecule is well
reproduced by the model. Emphasis was made on hydrogen bonding, and on the
tehrahedral, $q$, and translational, $\tau$, order parameters. An energetic
definition of the hydrogen bond gives more consistent results for the average
number of hydrogen bonds compared to the one-parameter distance criterion. At
300 K, an average value of 3.8 was obtained. The $q$ and $\tau$ metrics were
used to elucidate the water-like anomalous behaviour of the CF1 model. The
structural anomalies lead to the density anomaly, with a good agreement of the
model's density with the experimental $\rho(T)$ trends. The chemical
potential-density projection of the model's equation of state was explored.
Vapour-liquid coexistence was observed at sufficiently low temperatures.

26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol