Study of a Plane Free Jet Exhausting from a Channel by Vortex in Cell Method

Mohamed Ali Knani (1) , Henri-Claude Boisson (2) , André Giovannini (2) , Taieb Lili (1)

1 LMFT - Laboratoire de Mécanique des Fluides
2 IMFT - Institut de mécanique des fluides de Toulouse

A two-dimensional simulation of a plane jet exhausting from a channel has been performed using the vortex in cell algorithm in the Reynolds number range of 100 to 900. The vorticity is generated on the wall of the entrance channel whose length has been fixed in order to obtain a fully developed velocity profile at the entry of the jet. The transient behaviour of the velocity field starting from rest has been observed until reaching a quasi steady regime. The mean value of the velocity field is compared with the results of a finite volume computation on the same mesh. The velocity fluctuations obtained using this method are analysed. Their effect on the mean flow is estimated to be smaller than the viscous effect.

Mots clés: Vortex method; Plane Jet; Numerical simulation; velocity field; vortex flow; Lagrangian method

Domaines: Mécanique des fluides [physics.class-ph]

Mohamed Ali Knani, Henri-Claude Boisson, André Giovannini, Taieb Lili. Study of a Plane Free Jet Exhausting from a Channel by Vortex in Cell Method. International Journal for Numerical Methods in Fluids, 2006, 52, pp.529-543. ⟨10.1002/fld.1182⟩. ⟨hal-00128085⟩