  We present a generalization of dissipative particle dynamics that includes
shear forces between particles. The new algorithm has the same structure as the
(isothermal) smoothed particle dynamics algorithm, except that it conserves
angular momentum and includes thermal fluctuations consistently with the
principles of equilibrium statistical mechanics. This clarifies the connection
of dissipative particle dynamics with numerical resolution algorithms of the
macroscopic Navier-Stokes equations.
