Accession Number:

ADA143141

Title:

Environmental Impact Research Program. An Implicit, Wiggle-Free, and Accurate Upstream Finite-Difference Algorithm for the One-Dimensional Transport-Diffusion Equation.

Descriptive Note:

Final rept.,

Corporate Author:

TEXAS A AND M UNIV COLLEGE STATION DEPT OF CIVIL ENGINEERING

Personal Author(s):

Report Date:

1984-06-01

Pagination or Media Count:

57.0

Abstract:

A stable, accurate, and robust finite-difference algorithm has been successfully developed for engineering solution of the one-dimensional transport-diffusion equation. It is implicit and accurate to a higher order through removal of truncation errors, and uses quadratic upstream weighted differencing of the advection term to eliminate wiggle instabilities. Patterned after the explicit scheme, the implicit method essentially doubles the useful, stable range of application with comparable accuracy. Because of these significant improvements for one-dimensional problems, it is strongly recommended that the implicit method be extended to two dimensions. Author

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Theoretical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE