Investigation of three-dimensional effects on a cavitating Venturi flow

Jean Decaix (1) , Eric Goncalvès da Silva (1)

1 LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble]

A numerical investigation of the behaviour of a cavitation pocket developing along a Venturi geometry has been performed using a compressible one-fluid hybrid RANS/LES solver. The interplay between turbulence and cavitation regarding the unsteadiness and structure of the flow is complex and not well understood. This constitutes a determinant point to accurately simulate the dynamic of sheet cavities. Various turbulent approaches are tested: a new Scale-Adaptive model and the Detached Eddy Simulation. 2D and 3D simulations are compared with the experimental data. An oblique mode of the sheet is put in evidence.

Mots clés: Cavitation; Homogeneous model; Scale-adaptive model; 3D effects; Instabilities

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

Jean Decaix, Eric Goncalvès da Silva. Investigation of three-dimensional effects on a cavitating Venturi flow. International Journal of Heat and Fluid Flow, 2013, 44, pp.576-595. ⟨10.1016/j.ijheatfluidflow.2013.08.013⟩. ⟨hal-00866577⟩