• DOI:10.2514/6.1993-3360
• Corpus ID: 10241704

Time accuracy and the use of implicit methods. [in CFD

@inproceedings{Pulliam1993TimeAA,
  title={Time accuracy and the use of implicit methods. [in CFD},
  author={Thomas H. Pulliam},
  year={1993}
}

• T. Pulliam
• Published 6 July 1993
• Computer Science

Some of the approximations used to make implicit methods more efficient and practical for the solution of the Euler and Navier-Stokes equations are addressed. In particular, approximate factorizations, diagonalizations, and linearization approximations are reviewed and categorized. A subiteration correction scheme commonly in use at present is introduced, improved, demonstrated, and analyzed. This scheme is used to produce a second-order accurate, more robust implicit method for unsteady flow computations. The subiteration approach can be employed to recover time accuracy without increasing computational time (in most cases producing substantial savings).