Expansion of the condensing copper vapor into vacuum from a high-temperature source is
studied for transient and near-continuum flow regimes within the direct simulation Monte
Carlo method. Kinetic approach, which assumes cluster formation/decay description via
monomer-cluster reactions with corresponding cross-sections, is employed. Clusters
observed in calculations are of subnanoscale size. Impact of condensation on gas-dynamic
jet parameters is significant for the regimes for which the terminal mole cluster fraction in the …