Javascript must be enabled to continue!
Uncertainty Quantification of Turbulence Model Applied to a Cavitating Hydrofoil
View through CrossRef
Abstract
This paper presents the Global Sensitivity Analysis of the coefficients of the standard k-ε turbulence model used in RANS (Reynolds Averaged Navier-Stokes) simulations aimed to predict the flow around a bi-dimensional hydrofoil operating at non-cavitating and cavitating flow regimes. The sensitivity analysis is treated by the Sobol Decomposition, where the Sobol Indices are computed through the Polynomial Chaos Expansion of the 2-nd order with a Point-Collocation Non-Intrusive approach. From the current results, it seems that the considered cavitating flow regime is less sensitive to the variability of the input parameters, at least for the prediction of lift and drag.
Title: Uncertainty Quantification of Turbulence Model Applied to a Cavitating Hydrofoil
Description:
Abstract
This paper presents the Global Sensitivity Analysis of the coefficients of the standard k-ε turbulence model used in RANS (Reynolds Averaged Navier-Stokes) simulations aimed to predict the flow around a bi-dimensional hydrofoil operating at non-cavitating and cavitating flow regimes.
The sensitivity analysis is treated by the Sobol Decomposition, where the Sobol Indices are computed through the Polynomial Chaos Expansion of the 2-nd order with a Point-Collocation Non-Intrusive approach.
From the current results, it seems that the considered cavitating flow regime is less sensitive to the variability of the input parameters, at least for the prediction of lift and drag.
Related Results
DESIGN AND INVESTIGATION OF THE HYDRAULIC PERFORMANCE OF BIONIC HYDROFOIL BASED ON THE GEOMETRIC FEATURES OF STURGEONS
DESIGN AND INVESTIGATION OF THE HYDRAULIC PERFORMANCE OF BIONIC HYDROFOIL BASED ON THE GEOMETRIC FEATURES OF STURGEONS
The airfoils designed by the National Advisory Committee for Aeronautics (NACA) are currently adopted in the blades of hydraulic machinery (pump, water turbine). However, the NACA ...
New Perspectives for 3D Visualization of Dynamic Reservoir Uncertainty
New Perspectives for 3D Visualization of Dynamic Reservoir Uncertainty
This reference is for an abstract only. A full paper was not submitted for this conference.
Abstract
1 Int...
Reserves Uncertainty Calculation Accounting for Parameter Uncertainty
Reserves Uncertainty Calculation Accounting for Parameter Uncertainty
Abstract
An important goal of geostatistical modeling is to assess output uncertainty after processing realizations through a transfer function, in particular, to...
Cavitating Jet: A Review
Cavitating Jet: A Review
When a high-speed water jet is injected into water through a nozzle, cavitation is generated in the nozzle and/or shear layer around the jet. A jet with cavitation is called a “cav...
Study on Noise Attenuation Characteristics of Hydrofoil with Specific Cavitation Number
Study on Noise Attenuation Characteristics of Hydrofoil with Specific Cavitation Number
In this study, the modified Sauer cavitation model and Kirchhoff-Ffowcs Williams and Hawkings (K-FWH) acoustic model were adopted to numerically simulate the unsteady cavitation fl...
Numerical Simulation and Artificial Neural Network Modeling of Cavitation on 2D Tandem Hydrofoils Arrangement
Numerical Simulation and Artificial Neural Network Modeling of Cavitation on 2D Tandem Hydrofoils Arrangement
Abstract
In the current research, we used a parametric approach to investigate cavitation with tandem-arranged Clark Y-11.7% hydrofoils. We simulated the tandem-arra...
The uncertainty–investment relationship: scrutinizing the role of firm size
The uncertainty–investment relationship: scrutinizing the role of firm size
PurposeThe objective of this paper is threefold. First, it aims to empirically study whether firm-specific/idiosyncratic uncertainty, macroeconomic/aggregate uncertainty and politi...
Quantum turbulence
Quantum turbulence
Abstract
Chapter 5 delves into quantum turbulence in superfluid helium and atomic Bose-Einstein condensates (BECs). The foundation of quantum turbulence research ...

