A posteriori error and uncertainty estimation in computational ship hydrodynamics
Published in Ocean Engineering, 2020
Recommended citation: Terziev, M., Tezdogan, T. and Incecik, A., 2020. A posteriori error and uncertainty estimation in computational ship hydrodynamics. Ocean Engineering, 208, p.107434. https://doi.org/10.1016/j.oceaneng.2020.107434
Abstract
The increasing relevance of simulation-based design has created a need to accurately estimate and bind numerical errors. This is particularly relevant to full-scale computational ship hydrodynamics, where measurements are difficult and expensive, simultaneously requiring a high degree of predictive accuracy even in early design stages. However, the field of ship hydrodynamics has yet to fully exploit the enhanced capabilities and potential benefits numerical verification methods have to offer. The present study presents a detailed application of numerical verification procedures in CFD as applied to local parameters, such as free surface elevation and skin friction. This is done in order to pinpoint specific locations in the computational domain responsible for heightened levels of error and uncertainty. Relationships between different parameters are demonstrated and discussed based on a set of full-scale …
Highlights
- A local a posteriori numerical error estimator is applied to a ship hydrodynamics case.
- The numerical uncertainty in the free-surface and skin friction is prediction.
- The grid exhibits different asymptotic behaviour depending on the input parameter.
- Different uncertainty estimators provide vastly different results.