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| Uncertainty Analysis in CFD for Flow Simulation Around Ship Using RANS and DES |
| YANG Chun-Lei, ZHU Ren-Chuan, MIAO Guo-Ping, FAN Ju |
| (School of Naral Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) |
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Abstract Procedures for uncertainty analysis in CFD recommended by the ITTC (International Towing Tank Conference) have been used widely among methods of error estimate and credibility assessment in the field of ship. The method includes verification and validation which qualify the numerical and modeling uncertainty. Following the procedures, the results of uncertainty analysis for resistance and wave profile which are computed by RANS and DES methods (detached eddy simulation) was verified and validated. Numerical verification studies in grid convergence were performed using three grids with grid refinement ratio 42. The uncertainty results will lay the foundation for the development of CFD uncertainty analysis. The work demonstrates the usefulness of the proposed verification and validation procedures and establishes the levels of verification and validation of the simulation results in two different mathematical models.
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Received: 15 April 2011
Published: 30 March 2012
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