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## Physical Modelling of Unsteady Turbulence in Breaking Tidal Bores (2012)

Venue: | Sediment Processes and Flow Reversal in the Undular Tidal Bore of the Garonne River (France)." Environmental Fluid Mechanics |

Citations: | 6 - 3 self |

### Citations

355 |
Waves in Fluids.
- Lighthill
- 1978
(Show Context)
Citation Context ...e Froude number F is always greater than unity. For F < 1, the tidal wave cannot transform into a tidal bore. The tidal bore front is a turbulent unsteady flow motion that is comparable with a shock (=-=Lighthill 1978-=-). Fig. 1 shows a small tidal bore. Despite some recent advances (Hornung et al. 1995; Koch and Chanson 2009; Chanson 2010), knowledge of the unsteady turbulent motion in a tidal bore remains limited.... |

295 |
Open Channel Flow ”,
- Henderson
- 1966
(Show Context)
Citation Context ...h and velocity field at the bore front (Fig. 1). Once formed, the flow properties immediately in front of and behind the tidal bore must satisfy the continuity and momentum principles (Rayleigh 1908; =-=Henderson 1966-=-; Liggett 1994; Chanson 2012). The integral form of the equations of conservation of mass and momentum gives some relationship between the flow properties in front of and behind the bore front. For an... |

108 |
Hydraulics of Open Channel Flow: An Introduction, 2nd edn.,
- Chanson
- 2004
(Show Context)
Citation Context ...terms have different values between the model and prototype. In free-surface flows, including tidal bores, the gravity effects are important, and a Froude similitude is commonly used (Henderson 1966; =-=Chanson 1999-=-). That is, the model and prototype Froude numbers must be equal. However, the turbulent mixing processes are dominated by viscous forces, implying the needs for a Reynolds similitude. Fig. 1 shows th... |

50 |
Fluid Mechanics’,
- Liggett
- 1994
(Show Context)
Citation Context ...ield at the bore front (Fig. 1). Once formed, the flow properties immediately in front of and behind the tidal bore must satisfy the continuity and momentum principles (Rayleigh 1908; Henderson 1966; =-=Liggett 1994-=-; Chanson 2012). The integral form of the equations of conservation of mass and momentum gives some relationship between the flow properties in front of and behind the bore front. For an observer trav... |

32 |
Hydraulics of Open Channel Flow.
- Montes
- 1998
(Show Context)
Citation Context ...s boundary. For a solitary wave, Boussinesq (1871) assumed a linear distribution of vertical velocity Vz Vzðz dÞ z d ð6Þ The result may be applied to open channel flows with streamline curvature (=-=Montes 1998-=-). In this study, the magnitude of the maximum median vertical velocity component ðVzÞmax increased with increasing distance from the bed [Figs. 7(c) and 7(d)]. Fig. 9 shows d do t ts hs t1 t2 t3 Roll... |

23 |
Turbulence measurements in positive surges and bores,”
- Koch, Chanson
- 2009
(Show Context)
Citation Context ...al bore. The tidal bore front is a turbulent unsteady flow motion that is comparable with a shock (Lighthill 1978). Fig. 1 shows a small tidal bore. Despite some recent advances (Hornung et al. 1995; =-=Koch and Chanson 2009-=-; Chanson 2010), knowledge of the unsteady turbulent motion in a tidal bore remains limited. This study physically investigates the turbulent flow properties of tidal bores. A some experimental measur... |

22 |
The Flow Field Downstream of a Hydraulic Jump
- HORNUNG, WILLERT, et al.
- 1995
(Show Context)
Citation Context ... transform into a tidal bore. The tidal bore front is a turbulent unsteady flow motion that is comparable with a shock (Lighthill 1978). Fig. 1 shows a small tidal bore. Despite some recent advances (=-=Hornung et al. 1995-=-; Koch and Chanson 2009; Chanson 2010), knowledge of the unsteady turbulent motion in a tidal bore remains limited. This study physically investigates the turbulent flow properties of tidal bores. A s... |

16 |
Sur les ondes positives de translation dans les canaux et sur le ressaut ondule de faible amplitude. Houille Blanche,
- Lemoine
- 1948
(Show Context)
Citation Context ... function of the undular tidal bore Froude number; comparison between the present undular bore data, earlier laboratory studies (Treske 1994; Koch and Chanson 2009; Chanson 2010), linear wave theory (=-=Lemoine 1948-=-) and Boussinesq’s equation (Andersen 1978) Fig. 5. Ensemble-averaged median water depth dmedian, difference between 3rd and 4th quartiles (d75 d25), and difference between 90 and 10% percentiles (d... |

15 |
Undular Bores (Favre-Waves) in Open Channels - Experimental Studies.
- Treske
- 1994
(Show Context)
Citation Context ...Froude numbers (F > 1:5–1.6), a breaking bore with a marked roller was observed (Fig. 3). The findings were identical for smooth and rough bed, and they were comparable with those of earlier studies (=-=Treske 1994-=-; Hornung et al. 1995; Koch and Chanson 2009). For tidal bore Froude numbers less than 1.5, the bore consisted of a first wave followed by a train of well-formed undulations. The wave amplitude aw and... |

13 |
Unsteady Turbulence in Tidal Bores: Effects of Bed Roughness
- Chanson
- 2010
(Show Context)
Citation Context ... front is a turbulent unsteady flow motion that is comparable with a shock (Lighthill 1978). Fig. 1 shows a small tidal bore. Despite some recent advances (Hornung et al. 1995; Koch and Chanson 2009; =-=Chanson 2010-=-), knowledge of the unsteady turbulent motion in a tidal bore remains limited. This study physically investigates the turbulent flow properties of tidal bores. A some experimental measurements of free... |

10 |
Momentum Considerations in Hydraulic Jumps and Bores." Journal of Irrigation and Drainage Engineering, ASCE, Vol. 138 (DOI: 10.1061/(ASCE)IR.19434774.0000409). [In Print] Field observations Chanson, H
- Chanson
- 2012
(Show Context)
Citation Context ...re front (Fig. 1). Once formed, the flow properties immediately in front of and behind the tidal bore must satisfy the continuity and momentum principles (Rayleigh 1908; Henderson 1966; Liggett 1994; =-=Chanson 2012-=-). The integral form of the equations of conservation of mass and momentum gives some relationship between the flow properties in front of and behind the bore front. For an observer traveling at the s... |

8 |
Undular hydraulic jump
- Andersen
- 1978
(Show Context)
Citation Context ...e number; comparison between the present undular bore data, earlier laboratory studies (Treske 1994; Koch and Chanson 2009; Chanson 2010), linear wave theory (Lemoine 1948) and Boussinesq’s equation (=-=Andersen 1978-=-) Fig. 5. Ensemble-averaged median water depth dmedian, difference between 3rd and 4th quartiles (d75 d25), and difference between 90 and 10% percentiles (d90 d10) in a breaking tidal bore: (a) F ... |

8 | Characterisation of Unsteady Turbulence in Breaking Tidal Bores including the Effects of Bed Roughness." Hydraulic Model - Docherty, Chanson - 2010 |

7 |
Tidal Bores, Aegir, Eagre, Mascaret, Pororoca: Theory and Observations
- Chanson
(Show Context)
Citation Context ...atural ecosystem. For example, the bores of the Seine and Couesnon Rivers in France no longer exist after extensive training works and dredging and the construction of upstream barrage, respectively (=-=Chanson 2011-=-). Conclusions The unsteady turbulence in tidal bores was investigated physically under controlled conditions with two types of bed roughness: smooth PVC and fixed gravel bed. Some free-surface measur... |

7 | Free-surface fluctuations in hydraulic jumps: Experimental observations - Murzyn, Chanson |

6 | Théorie de l’Intumescence appelée Onde Solitaire ou de Translation se Propageant dans un Canal Rectangulaire." ('Theory of the Solitary Wave propagating in an Rectangular Channel.') Comptes-Rendus de l'Académie des Sciences - Boussinesq - 1871 |

6 | Free Surface Length Scale Estimation in Hydraulic Jumps - MOUAZE, MURZYN, et al. - 2005 |

3 |
Note on tidal bores
- Rayleigh
- 1908
(Show Context)
Citation Context ...s in water depth and velocity field at the bore front (Fig. 1). Once formed, the flow properties immediately in front of and behind the tidal bore must satisfy the continuity and momentum principles (=-=Rayleigh 1908-=-; Henderson 1966; Liggett 1994; Chanson 2012). The integral form of the equations of conservation of mass and momentum gives some relationship between the flow properties in front of and behind the bo... |