Application of grid convergence index estimation for uncertainty quantification in V&V of multidimensional thermal-hydraulic simulation

Tanaka, Masaaki  

Author has proposed a procedure combined with V&V and numerical prediction processes called as V2UP (V&V plus Uncertainty quantification and Prediction) in a numerical estimation by multi-dimensional simulation codes. In the V2UP, uncertainty quantification by Grid Convergence Index (GCI) is required in the verification and the fundamental validation steps. The numerical simulations and the uncertainty quantifications were conducted using several GCI estimation methods in order to specify the reference method in the V2UP. Through the examinations, the SLS-GCI (Simplified Least Square version GCI) method modified from the Eca's least-square version GCI method could be defined.