Numerical simulation of cavitating flows under uncertainty

1st International Seminar on Non-Ideal Compressible-Fluid Dynamics for Propulsion & Power

物理学;力学

Rodio, M.G.^1 ; Abgrall, R.^2 ; Congedo, P.M.^3

Den-Service de Thermo-hydraulique et de Mécanique des Fluides (STMF), CEA, Université Paris-Saclay, Gif-sur-Yvette

F-91191, France^1

Universität Zürich, Winterthurerstrasse 190, Zürich

CH-8057, Switzerland^2

Team CARDAMOM, INRIA Bordeaux Sud-Ouest, Talence, Cedex

33405, France^3

关键词: Cavitating flow;    Cavitation structure;    Equation of state;    Mixture velocity;    Numerical solution;    Numerical solvers;    Two-phase model;    Uncertain parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/821/1/012009/pdf
DOI  :  10.1088/1742-6596/821/1/012009

学科分类：力学，机械学

来源: IOP

【 摘 要 】

Cavitation is characterized by vapor bubbles creation in the liquid phase as a consequence of a pressure drop. This phenomenon can be reproduced by means of several two-phase models. An equation of state is commonly used in order to define the thermophysical properties of the two fluids and to close the model. The aim of this work is to study how the uncertain parameters of the equation of state (EOS) can influence the prediction of the cavitation structures. These uncertainties are propagated through a two-phase numerical solver for evaluating the impact on the predictive character of the numerical solution. The variability of the mixture velocity and the mixture pressure are analyzed.