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Showing 1 to 3 of 3 for “"Closure Laws"”.
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Advanced framework for assessment and reduction of model form uncertainty of the closure laws in thermal-hydraulics codes
… models to close the system of equations. These closure laws describe the steady-state and dynamic characteristics of multi-phase media in terms of averaged field equations. The resolution required to model such terms is no longer a part of the system of equations, hence these closure laws must …
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Inference and Entropy in Free-Surface Flows
… resulting equations often rely on a heuristic closure model to capture the interaction between the sub-filter scale features and the bulk features. In this thesis we explore two methods for deriving closure laws for filtered models – information entropy/energy dissipation maximisation and …
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A hierarchical Bayesian calibration framework for quantifying input uncertainties in thermal-hydraulics simulation models
… on expert judgment, especially for parameters in closure laws or empirical correlations that are used to describe complex two-phase flow and heat transfer phenomena. The physical model parameters used in empirical correlations cannot be directly measured nor have inherent physical meanings, so …