Validation of Modeling Flow Approaching Navigation Locks
Abstract
Experiments were conducted to assess the ability of the 2D depth-averaged numerical flow solver AdH to compute flow conditions in the approach to navigation locks. The velocity distribution computed with the numerical model was compared with similar data obtained on a physical model. The simulation results of two bathymetric configurations were evaluated. The Plan A lock approach had a rather simple bed geometry with a fairly flat bottom and simple side slopes. The Plan B lock approach had a series of submerged weirs upstream of the guard wall, placed normal to the navigation sailing line. Other than the flow between the guard wall cells, the numerical model accurately reproduced the flow distribution, velocity magnitudes, and directions compared in the Plan A lock approach; however, the numerical model did not accurately reproduce the velocity with the Plan B lock approach. Experiments were conducted to determine if reasonable changes to model parameters could result in more accurate numerical model results. Extending the weir material had an effect; however, it was not sufficient to reproduce the observed data. The accuracy of the velocity of the flow between the guard wall cells did not improve in either case. These effects are attributed to both the mild-slope and hydrostatic pressure assumptions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2013
- Accession Number
- ADA584400
Entities
People
- Carlos B. Bislip-morales
- Richard L. Stockstill
Organizations
- Engineer Research and Development Center