Abstract
Grid-induced errors in CFD solutions can be generated at one location and then transported elsewhere. The amount of error generated and its propagation depend on the mesh, the numerical method of solution, and the solution itself. This error introduced by the grid in finite-difference and finite-volume solutions can be estimated by a discrete error-transport equation (DETE). The accuracy with which the DETE can estimate grid-induced errors depends on how well the residual in DETE is modeled. Though the DETE approach belongs to the category of single-grid error estimators, this paper examines the usefulness of estimating the residual from solutions obtained on multiple grids.
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