Title page for ETD etd-09152008-172324


Type of Document Dissertation
Author Perez, Rafael A
URN etd-09152008-172324
Title Uncertainty Analysis of Computational Fluid Dynamics Via Polynomial Chaos
Degree PhD
Department Aerospace and Ocean Engineering
Advisory Committee
Advisor Name Title
Walters, Robert W. Committee Chair
Barnwell, Richard W. Committee Member
Borggaard, Jeffrey T. Committee Member
Cliff, Eugene M. Committee Member
Wang, Joseph J. Committee Member
Keywords
  • error
  • uncertainty
  • Polynomial chaos
  • probabilistic
  • stochastic
Date of Defense 2008-09-02
Availability unrestricted
Abstract
The main limitations in performing uncertainty analysis of CFD models using conventional methods are associated with cost and effort. For these reasons, there is a need for the development and implementation of efficient stochastic CFD tools for performing uncertainty analysis. One of the main contributions of this research is the development and implementation of Intrusive and Non-Intrusive methods using polynomial chaos for uncertainty representation and propagation. In addition, a methodology was developed to address and quantify turbulence model uncertainty. In this methodology, a complex perturbation is applied to the incoming turbulence and closure coefficients of a turbulence model to obtain the sensitivity derivatives, which are used in concert with the polynomial chaos method for uncertainty propagation of the turbulence model outputs.
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