- Author
-
Swaffield, J. A.
- Title
- Initial Study of the Application of the Numerical Method of Characteristics to Unsteady Flow Analysis in Partially Filled Gravity Drainage Sized Pipes.
- Coporate
- National Bureau of Standards, Washington, DC
- Sponsor
- Department of Housing and Urban Development, Washington, DC
- Report
-
NBSIR 81-2308
July 1981
- Distribution
- Available from National Technical Information Service
- Keywords
-
pipe flow; unsteady flows; drains;
- Identifiers
- method of characteristics; drain pipes
- Abstract
- The application of the numerical method of characteristics to the solution of the differential equations defining unsteady flow in partially filled drainage system sized pipes is outlined. The derivation of the flow equations is presented, together with the necessary boundary equation formulation to represent variable inflow, system discharge and leakage flow past a stationary deposited solid. A computer program, written in Fortran, is included, together with typical output, that establishes the applicability of this computational method to unsteady flow analysis in gravity flow drainage systems. Proposals for the extension of the described techniques to the prediction of solid transport and flow attenuation in long pipes are also presented.