Three-dimensional adaptive grid-embedding euler technique

Roger L. Davis, John F. Dannenhoffer

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

A new three-dimensional adaptive-grid Euler procedure is presented that automatically detects high-gradient regions in the flow and locally subdivides the computational grid in these regions to provide a uniform, high level of accuracy over the entire domain. A tunable, semistructured data system is utilized that provides global, topological unstructured-grid flexibility along with the efficiency of a local, structured-grid system. In addition, this data structure allows for the flow solution algorithm to be executed on a wide variety of parallel/vector computing platforms. An explicit, time-marching, control volume procedure is used to integrate the Euler equations to steady state. In addition, a multiple-grid procedure is used throughout the embedded-grid regions as well as on subgrids coarser than the initial grid to accelerate convergence and properly propagate disturbance waves through refined-grid regions. Upon convergence, high flow gradient regions, where it is assumed that large truncation errors in the solution exist, are detected using a combination of directional refinement vectors that have large components in areas of these gradients. The local computational grid is directionally subdivided in these regions and the flow solution is reinitiated. Overall convergence occurs when a prespecified level of accuracy is reached. Solutions are presented that demonstrate the efficiency and accuracy of the present procedure.

Original languageEnglish (US)
Pages (from-to)1167-1174
Number of pages8
JournalAIAA journal
Volume32
Issue number6
DOIs
StatePublished - Jun 1994
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering

Fingerprint Dive into the research topics of 'Three-dimensional adaptive grid-embedding euler technique'. Together they form a unique fingerprint.

  • Cite this