direct numerical simulation

direct numerical simulation

[də¦rekt nü¦mer·ə·kəl ‚sim·yə′lā·shən]

(fluid mechanics)

Simulation of fluid flow that is carried out through numerical integration of the Navier-Stokes equation in a two-stage process: a temporal approximation involving the splitting of the equation into linear and nonlinear parts and the approximation of time derivatives with finite differences, and a spatial approximation involving the replacement of spatial derivatives with finite difference, finite element, spectral, or hybrid numerical approximations. Abbreviated DNS.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.