Hybrid Density- And Pressure-based Splitting
Scheme For Cavitating Flows Simulation
Author(s)
T. Alexandrikova, A. Pavlov & V. Streltsov
Abstract
A new numerical method to simulate steady-state isothermal liquid flows with
hydraulic cavitation is proposed. The 3D averaged N-S equations with Lam-
Bremhorst κ – ε turbulence model are used. The barotropic state equation is
developed basing on thermodynamic equilibrium relations.
Simulation of such flows faces a lot of numerical difficulties concerned with
variations of density, speed of sound and time scale.
The method is a hybrid splitting scheme that is a mixture of \“density-based” and
\“pressure-based” approaches. The splitting scheme is the \“pressure-based”
SIMPLE-type algorithm in the region of incompressible liquid flow without
cavitation. The scheme degenerates to the \“density-based” algorithm in a
compressible region (2-phase state or pure gas). The proposed method differs
from both \“density-based” preconditioned algorithms and SIMPLE-type methods
adapted to the case of cavitating flows.
The method has been tested on numerous typical 3D problems with hydraulic
cavitation. Results of numerical simulation are in good agreement with
experimental data. The algorithm shows high efficiency for the considered
problems. The method has been implemented in FloEFDТМ.
Keywords: cavitating flows, numerical method, splitting scheme.
1 Introduction
A new numerical algorithm for simulation of cavitating flows is proposed in the
paper. Cavitating flows are encountered in a wide range of applications playing
mostly negative but sometimes positive role. We consider hydraulic cavitation
Keywords
cavitating flows, numerical method, splitting scheme
Related Book
Other papers in this volume
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