Evaluation of the turbulence model influence on the numerical simulations of unsteady cavitation

By Olivier Coutier-Delghosa, Regiane Fortes Patella, J. Reboud. 2001

460 citations recorded by the source corpus.

Unsteady cavitation in a Venturi-type section was simulated by two-dimensional computations of viscous, compressible, and turbulent cavitating flows. The numerical model used an implicit finite volume scheme (based on the SIMPLE algorithm) to solve Reynolds-averaged Navier-Stokes equations, associated with a barotropic vapor/liquid state law that strongly links the density variations to the pressure evolution. To simulate turbulence effects on cavitating flows, four different models were implemented (standard k−e RNG; modified k−e RNG; k−ω with and without compressibility effects), and numerical results obtained were compared to experimental ones. The standard models k−e RNG and k−ω without compressibility effects lead to a poor description of the self-oscillation behavior of the cavitating flow. To improve numerical simulations by taking into account the influence of the compressibility of the two-phase medium on turbulence, two other models were implemented in the numerical code: a modified k−e model and the k−ω model including compressibility effects. Results obtained concerning void ratio, velocity fields, and cavitation unsteady behavior were found in good agreement with experimental ones. The role of the compressibility effects on turbulent two-phase flow modeling was analyzed, and it seemed to be of primary importance in numerical simulations.

Subfields: Civil and Structural Engineering, Computational Mechanics, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/35cb305b47881b521ced21b2143fe437d481f8e4

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Civil and Structural Engineering

1. O. Coutier-Delgosha
2. J. Leroux
3. J. Astolfi

In Computational Mechanics

1. J. Leroux
2. J. Astolfi
3. O. Coutier-Delgosha
4. Martin Ostoja-Starzewski
5. G. Wang

In Mechanics of Materials

1. J. Leroux
2. J. Astolfi
3. O. Coutier-Delgosha
4. Martin Ostoja-Starzewski
5. G. Wang

Citations in the corpus

• Numerical simulation of the unsteady behaviour of cavitating flows (2003, background): “The non-matching connections are treated with an interpolation method especially adapted to our algorithm, and the details can be found in Reference [18].”
• Experimental evaluation of numerical simulation of cavitating flow around hydrofoil (2005, unknown): “Keywords:Cavitation; Single hydrofoil; Visualization; PIV-LIV method; CFD”
• Numerical simulation of unsteady cavitation flow in a centrifugal pump at off-design conditions (2014, background): “where n is a constant and set to 10.(10) The liquid–vapour mass transfers due to cavitation are solved by the transport equation-based cavitation model”
• Analysis of cavitating flow structure by experimental and numerical investigations (2007, methodology): “The main features of the solver are given next, and additional details can be found in Coutier-Delgosha et al. (2003a).”
• A joint experimental and numerical study of mechanisms associated to instability of partial cavitation on two-dimensional hydrofoil (2005, methodology): “…density is managed by a postulated barotropic state law (Figure 2), which is mainly composed of three parts: As reported in [Yuan and Schnerr, 2001, Coutier-Delgosha et al., 2003a,], simulating cloud cavitation with a standard twoequations turbulence model comes up against serious difficulties,…”