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国际流体力学研究期刊
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN 打印: 2152-5102
ISSN 在线: 2152-5110

国际流体力学研究期刊

DOI: 10.1615/InterJFluidMechRes.v39.i2.60
pages 160-169

CFD Simulation and Grid Study of a Cavitating Orifice Flow

M. Fuchs
Aalen University of Applied Sciences, Aalen, Germany
Winfried Waidmann
University of Applied Sciences Aalen, Department of Mechanical Engineering, Aalen, Germany
Martin Macdonald
Glasgow Caledonian University, School of Engineering and Computing Glasgow, United Kingdom

ABSTRACT

A cavitating flow through an orifice is investigated by the use of computational fluid dynamics (CFD) with an ANSYS CFX solver. Turbulence is described by the Menter shear stress transport (SST) model, mass transfer due to cavitation by the Rayleigh−Plesset based default cavitation model. A grid study following the best practice guidelines known from literature has shown as not sufficient enough for the simulation of a cavitating flow. When refining the grid monitor values e. g. the mass flow rate reached convergence at a certain amount of elements, whereas the cavitation zones itself changed in shape and location until a significantly high resolution is reached. The SST turbulence model calculates the boundary layer with a wall function approach at high YPLUS values and resolves it at small YPLUS values. The accuracy of the simulation was increased by avoiding the use of the wall function approach.