  Molecular Dynamics (MD) simulation is carried out to examine the effect of
particle confinement on the pressure of 3D Yukawa gas. Confinement effects are
taken into account by using perfectly reflecting boundary condition in MD
simulations. An equation of state relating pressure to number density is
obtained. The results of the MD simulations show that in weak coupling regime
pressure of confined Yukawa gas is much bigger than the kinetic pressure and
scales quadratically with number density. Results are compared with earlier
theories and experiments which show quadratic scaling of dust pressure with
density.
