Abstract
| Original language | Unknown |
|---|---|
| Pages (from-to) | 305-313 |
| Journal | Proceedings Of The Institution Of Civil Engineers-Water Management |
| Volume | 163 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jan 2010 |
Keywords
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Geomorphic dam-break flows. Part II: numerical simulation. / Leal, João Gouveia Aparício Bento.
In: Proceedings Of The Institution Of Civil Engineers-Water Management, Vol. 163, No. 6, 01.01.2010, p. 305-313.Research output: Contribution to journal › Article
TY - JOUR
T1 - Geomorphic dam-break flows. Part II: numerical simulation
AU - Leal, João Gouveia Aparício Bento
PY - 2010/1/1
Y1 - 2010/1/1
N2 - This paper presents the comparison between numerical results obtained with a conceptual model proposed in a companion paper and experimental results collected from previous studies. The numerical model is based on a finite difference approximation using the MacCormack scheme with a total variation diminishing highresolution correction term for the mixture mass and momentum conservation equations and an artificial viscosity term for the sediment mass conservation equation. From the comparison between numerical and experimental results, it can be verified that the model generally gives results in good agreement with the experimental data and the wave structure is in accordance with what has been reported in previous studies. The estimation of model parameters based on existing sheet-flow data seems a promising way of developing models without arbitrary choice of values for tuning parameters. Some limitations can be identified, namely the equilibrium sediment transport approach implies that the model cannot simulate the hydraulic jump formed in the higher mobility bed for dry bed conditions. The use of a constant friction factor does not allow simulating the exact wave-front location for all instants in time.
AB - This paper presents the comparison between numerical results obtained with a conceptual model proposed in a companion paper and experimental results collected from previous studies. The numerical model is based on a finite difference approximation using the MacCormack scheme with a total variation diminishing highresolution correction term for the mixture mass and momentum conservation equations and an artificial viscosity term for the sediment mass conservation equation. From the comparison between numerical and experimental results, it can be verified that the model generally gives results in good agreement with the experimental data and the wave structure is in accordance with what has been reported in previous studies. The estimation of model parameters based on existing sheet-flow data seems a promising way of developing models without arbitrary choice of values for tuning parameters. Some limitations can be identified, namely the equilibrium sediment transport approach implies that the model cannot simulate the hydraulic jump formed in the higher mobility bed for dry bed conditions. The use of a constant friction factor does not allow simulating the exact wave-front location for all instants in time.
KW - barrages & reservoirs floods & floodworks safety & hazards movable beds sheet-flow wave velocity scheme
KW - dams
U2 - 10.1680/wama.2010.163.6.305
DO - 10.1680/wama.2010.163.6.305
M3 - Article
VL - 163
SP - 305
EP - 313
JO - Proceedings Of The Institution Of Civil Engineers-Water Management
JF - Proceedings Of The Institution Of Civil Engineers-Water Management
SN - 1741-7589
IS - 6
ER -