DL POLY

DL_POLY is a general purpose serial and parallel molecular dynamics simulation package developed at Daresbury Laboratory by W. Smith, T.R. Forester and I.T. Todorov.

Units

DL_POLY employs an interesting set of units which have molecular relevance:

physical quantity	symbol	unit value
time	$t_{0}$	$1\times 10^{-12}$ seconds (picoseconds)
length	$l_{0}$	$1\times 10^{-10}$ metres (Angstroms)
mass	$m_{0}$	$1.66054\times 10^{-27}$ kilograms (amu)
charge	$q_{0}$	$1.60218\times 10^{-19}$ Coulombs (electron charge)
energy	$E_{0}=m_{0}(l_{0}/t_{0})^{2}$	$1.66054\times 10^{-23}$ Joules = 10 J mol $^{-1}$
pressure	$p_{0}=E_{0}/l_{0}^{3}$	$1.66054\times 10^{7}$ Pascal = 166.054 bar
Planck constant	$\hbar$	Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle 6.35078 E_0 t_0 }
Boltzmann constant	Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle k_B}	Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle 0.83145 E_0/K }