Estimation of 1D-confluence model parameters in right-angled discordant beds’ confluences using 3D numerical model
Autori
Đorđević, DejanaStojnić, Ivan
Ostala autorstva
Erpicum, SébastienDewals, Benjamin
Archambeau, Pierre
Pirotton, Michel
Konferencijski prilog (Objavljena verzija)
,
2016 Taylor & Francis Group
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Parameters of 1D confluence models are originally defined for concordant beds’ (CB’s) confluences. This paper aims at estimating these parameters for discordant beds’ confluences using numerical simulation results of 3D flow. A 3D finite-volume based model SSIIM2 that was successfully validated in CB’s confluences is applied in this study, too. Confluences with the low,moderate and maximal observed bed elevation discordance ratio values are analysed for three characteristic hydrological scenarios: dominance of the tributary flow, equal contributions of the combining flows and dominance of the main-river flow. It is shown that: 1) the mean flow angle δ approaches junction angle α with the increase in bed elevation discordance, especially when tributary flow dominates, 2) the value of Hager’s correction coefficient σ is not constant and 3) the contribution of the tributary flow to the 1D momentum equation is under predicted when either parameter δ or σ is used for its estimation.
Ključne reči:
1D confluence model / discordant beds' confluence / mean flow angle δ / Hager’s correction coefficient σ / estimation of parametersIzvor:
Sustainable hydraulics in the era of global change, Proceedings of the 4th IAHR Europe Congress (Liege, Belgium, 27-29 July 2016) , Advances in water engineering and research, 2018, 684-690Izdavač:
- CRC Press, Taylor & Francis Group
Finansiranje / projekti:
- Merenje i modeliranje fizičkih, hemijskih, bioloških i morfodinamičkih parametara reka i vodnih akumulacija (RS-MESTD-Technological Development (TD or TR)-37009)
- Sistemi za odvođenje kišnih voda kao deo urbane i saobraćajne infrastrukture (RS-MESTD-Technological Development (TD or TR)-37010)
Institucija/grupa
GraFarTY - CONF AU - Đorđević, Dejana AU - Stojnić, Ivan PY - 2018 UR - https://grafar.grf.bg.ac.rs/handle/123456789/1856 AB - Parameters of 1D confluence models are originally defined for concordant beds’ (CB’s) confluences. This paper aims at estimating these parameters for discordant beds’ confluences using numerical simulation results of 3D flow. A 3D finite-volume based model SSIIM2 that was successfully validated in CB’s confluences is applied in this study, too. Confluences with the low,moderate and maximal observed bed elevation discordance ratio values are analysed for three characteristic hydrological scenarios: dominance of the tributary flow, equal contributions of the combining flows and dominance of the main-river flow. It is shown that: 1) the mean flow angle δ approaches junction angle α with the increase in bed elevation discordance, especially when tributary flow dominates, 2) the value of Hager’s correction coefficient σ is not constant and 3) the contribution of the tributary flow to the 1D momentum equation is under predicted when either parameter δ or σ is used for its estimation. PB - CRC Press, Taylor & Francis Group C3 - Sustainable hydraulics in the era of global change, Proceedings of the 4th IAHR Europe Congress (Liege, Belgium, 27-29 July 2016) , Advances in water engineering and research T1 - Estimation of 1D-confluence model parameters in right-angled discordant beds’ confluences using 3D numerical model EP - 690 SP - 684 DO - 10.1201/b21902 ER -
@conference{ author = "Đorđević, Dejana and Stojnić, Ivan", year = "2018", abstract = "Parameters of 1D confluence models are originally defined for concordant beds’ (CB’s) confluences. This paper aims at estimating these parameters for discordant beds’ confluences using numerical simulation results of 3D flow. A 3D finite-volume based model SSIIM2 that was successfully validated in CB’s confluences is applied in this study, too. Confluences with the low,moderate and maximal observed bed elevation discordance ratio values are analysed for three characteristic hydrological scenarios: dominance of the tributary flow, equal contributions of the combining flows and dominance of the main-river flow. It is shown that: 1) the mean flow angle δ approaches junction angle α with the increase in bed elevation discordance, especially when tributary flow dominates, 2) the value of Hager’s correction coefficient σ is not constant and 3) the contribution of the tributary flow to the 1D momentum equation is under predicted when either parameter δ or σ is used for its estimation.", publisher = "CRC Press, Taylor & Francis Group", journal = "Sustainable hydraulics in the era of global change, Proceedings of the 4th IAHR Europe Congress (Liege, Belgium, 27-29 July 2016) , Advances in water engineering and research", title = "Estimation of 1D-confluence model parameters in right-angled discordant beds’ confluences using 3D numerical model", pages = "690-684", doi = "10.1201/b21902" }
Đorđević, D.,& Stojnić, I.. (2018). Estimation of 1D-confluence model parameters in right-angled discordant beds’ confluences using 3D numerical model. in Sustainable hydraulics in the era of global change, Proceedings of the 4th IAHR Europe Congress (Liege, Belgium, 27-29 July 2016) , Advances in water engineering and research CRC Press, Taylor & Francis Group., 684-690. https://doi.org/10.1201/b21902
Đorđević D, Stojnić I. Estimation of 1D-confluence model parameters in right-angled discordant beds’ confluences using 3D numerical model. in Sustainable hydraulics in the era of global change, Proceedings of the 4th IAHR Europe Congress (Liege, Belgium, 27-29 July 2016) , Advances in water engineering and research. 2018;:684-690. doi:10.1201/b21902 .
Đorđević, Dejana, Stojnić, Ivan, "Estimation of 1D-confluence model parameters in right-angled discordant beds’ confluences using 3D numerical model" in Sustainable hydraulics in the era of global change, Proceedings of the 4th IAHR Europe Congress (Liege, Belgium, 27-29 July 2016) , Advances in water engineering and research (2018):684-690, https://doi.org/10.1201/b21902 . .