  Large scale molecular dynamics simulations of freely decaying turbulence in
three-dimensional space are reported. Fluid components are defined from the
microscopic states by eliminating thermal components from the coarse-grained
fields. The energy spectrum of the fluid components is observed to scale
reasonably well according to Kolmogorov scaling determined from the energy
dissipation rate and the viscosity of the fluid, even though the Kolmogorov
length is of the order of the molecular scale.
