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Title: Investigation and analysis of dam-break flow problem
Author: Chegini, Amir H. Nezamivand
ISNI:       0000 0004 2692 0286
Awarding Body: The University of Manchester
Current Institution: University of Manchester
Date of Award: 1997
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Variations of the flow characteristicsh ave been investigatedf or the flow propagationd ue to a dam-plate removal. Experiments were carried out for various water depth ratios (Hj/H,, 0,0.1,0.45,0.7) in a flume with / without an obstacle downstream of the damsite. Measurementso f flow characteristicsw ere made in the laboratory using a Particle ImageV elocimetry (PIV) system.T o assessth e accuracyo f the PIV measuremenst ystem, Water Level Meter (WLM) measurements have been taken. Comparison of PIV and WLM measureds urfacee levationsa re presentedT. he image analysiss ystemv isualisedt he jet and mushroom formations as complex flow in the downstream section for the low depth ratios. The video image also illustrated the oscillation flow in the downstream channel for the high depth ratios. One-dimensional analytical and numerical calculations have been presented to simulate the experimental results. The numerical models use a semi-implicit Lagrangian finite difference scheme and a WAF Riemann problem based method, the governing equations being the Saint-Venant equations for an invisid and incompressible free surface flow. The models have the advantage that water motions can be simulated, and give particularly good results for the subcritical flow. In general, the models produced good agreement with experimental results.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available