Third M.I.T. Conference on Computational Fluid and Solid Mechanics June 14–17, 2005  

Compressible effects on ice particle growth in turbulent jets

E. Maglaras*, F. Garnier
Office National d'Etudes et de Recherche Aérospatiales, 29, av. De la Division Leclerc, BP 72, 92322 Châtillon, France

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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.

Keywords:  Large eddy simulation; Temporal simulation; Compact schemes; Turbulent heated jet; Compressible effects; Growing ice particles; Lagrangian approach

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