Estimation of 1D-confluence model parameters in right-angled discordant beds’ confluences using 3D numerical model
Аутори
Đorđević, DejanaStojnić, Ivan
Остала ауторства
Erpicum, SébastienDewals, Benjamin
Archambeau, Pierre
Pirotton, Michel
Конференцијски прилог (Објављена верзија)
,
2016 Taylor & Francis Group
Метаподаци
Приказ свих података о документуАпстракт
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.
Кључне речи:
1D confluence model / discordant beds' confluence / mean flow angle δ / Hager’s correction coefficient σ / estimation of parametersИзвор:
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, 684-690Издавач:
- CRC Press, Taylor & Francis Group
Финансирање / пројекти:
- Мерење и моделирање физичких, хемијских, биолошких и морфодинамичких параметара река и водних акумулација (RS-37009)
- Системи за одвођење кишних вода као део урбане и саобраћајне инфраструктуре (RS-37010)