ABSTRACT
In order to understand the process of formation of condensation trail (contrail), the flow in the near field of an engine jet is numerically studied. Three-dimensional temporal evolution of a non-isothermal turbulent round jet laden with solid particles is modelled using the large eddy simulation technique. The particles are tracked by the Lagrangian approach and their growth is calculated by a microphysics model of vapour condensation and ice formation. We only consider water mass exchange between the two phases of the fluid. A series of simulations has been performed with a low Mach number (M = 0.2) and a moderate one (M = 1) at a realistic Reynolds number (Re = 3.2 × 10⁶ ). To determine the compressibility effects on the evolution of particles, we examine their spatial distribution and their growth at the different Mach numbers.