Accession Number:

ADA207176

Title:

Repair, Evaluation, Maintenance, and Rehabilitation Research Program: Explicit Numerical Algorithm for Modeling Incompressible Approach Flow

Descriptive Note:

Final rept.

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB

Personal Author(s):

Report Date:

1989-03-01

Pagination or Media Count:

72.0

Abstract:

Adverse approach flow can increase the frequency of repair and the cost of maintenance while reducing the working life of a hydraulic structure. In many cases it is less expensive to modify the approach than to pay the long-term costs that would result form continued operation under existing flow conditions. Accordingly, the modifications themselves must be chosen to achieve the greatest benefit with the simplest and least expensive remedial measures. A new computer program, STREMR, is under development to aid scientists, mathematicians, and engineers in simulating complex approach flows. The STREMR code is a finite- difference numerical model for two-dimensional depth- or width-averaged flow with boundaries and obstacles of arbitrary shape. The existing formulation is a predictor-corrector scheme derived from MacCormacks method. As such, it is applicable for transient flow at low Froude number, and for steady-state subcritical flow at moderate Froude number. The algorithm has been incorporated in the STREMR computer program, which will allow engineers and scientists to simulate the effects of structural modifications and repair measures prior to physical testing. The results of essential benchmark calculations are included for verification. Keywords Two dimensional flow Approach channels Hydraulic models Incompressible flow Mathematical models Shallow water Subcritical flow.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE