The Hydraulic and Hydromorphology Laboratory (HHLab) is a platform of 350 m² that includes three physical models (built and equipped from 2013 to 2017). This platform is dedicated to the study of physical processes associated with river flows or flows in a highly anthropized environment.
The three facilities are
- A wide flume, 3 m-wide, 18 m-long, 80 cm-deep, with a fixed bed slope of 1/1000.
- A tilting flume, 1 m-wide, 18 m-long, 80 cm-deep, with a maximum bed slope of 5 %.
- An urban flood model (MURI), 5.4 m-long, 3.8 m-wide, with maximum slopes of 5 % in the longitudinal and transverse directions.
Characteristics of the physical models
|Wide flume||Tilting flume||MURI|
|Total length||18 m||18 m||5.4 m|
|Width||3 m||1 m||3.8 m|
|Height||80 cm||80 cm||15 cm|
|Inlet conditions||3 independant inlet tanks||1 inlet tank||1 to 9 inlet tanks|
300 L.s-1 (75 L.s-1 + 150 L.s-1 + 75 L.s-1)
|150 L.s-1||50 L.s-1 to be shared between 1 to 9 inlets|
|Outlet conditions||3 adjustable tail weirs||1 adjustable tail weir||3 adjustable tail weirs+ 3 outlet tanks|
|Maximum bed slope||1/1000||5/100||5/100 in both directions|
Water and sediment supply
The two long flumes (wide and tilting) are supplied in in three different ways:
- Clean water can be supplied through a constant head water tower. The water is then recycled in a basement area.
- Sediment (diameter < 1 mm) laden water can also be supplied in a close loop. The water is recycled in another smaller basement area equipped with stirrer to homogenize the sediment concentration.
- Finally, it is possible to work in an open configuration for coarse sediment. The sediment settles in an intermediate tank. The flumes are fed in sediment independently of the water.
The scheme below illustrated these different modes:
Several sensors are deployed:
- Ultrasound sensors to measure free-surface elevation (9 sensors, 3 up-stream, 3 downstream, 3 mobile),
- Discharge measurements with an electromagnetic flowmeter at the entrance of the flume.
- Velocity measurements (Pitot tube, Acoustic Doppler Velocimeter, and PIV systems).
- Topographic measurements with a 2D laser scan (submillimetrical resolution, Scan-Control 2900-100)
These sensors are fixed to a motorized trolley and can be moved automatically.
We use these facilities to address multiple issues such as :
- vegetated flows
- shear flows (compound channels and mixing layers),
- transverse waves in stationary flows,
- urban floods,
- interactions between sediments of different sizes,
- alternated bars dynamics,
- unsteady flows
PhD and HdR Theses
- OUKACINE, M. – 2019. Étude expérimentale et numérique d’écoulements à surface libre en présence d’obstacles émergés et faiblement submergés. Thèse de doctorat, Mécaniques des fluides, Université de Paris Est. 231 p.
- PERRET, E. – 2017. Transport of moderately sorted gravels at low bed shear stresses: impact of bed arrangement and fine sediment infiltration. Thèse de doctorat, Mécaniques des fluides, Université de Lyon. 378 p.
- DUPUIS, V. – 2016. Experimental investigation of flows subjected to a longitudinal transition in hydraulic roughness in single and compound channels. Thèse de doctorat, spécialité : Mécanique des fluides, Université Lyon I Claude Bernard. 141 p.
- PROUST, S. – 2015. Steady non-uniform overbank flows in compound open-channels. Mémoire d’HDR, ED MEGA, Université Claude Bernard Lyon I.
- PROUST, S., NIKORA, V.I. – 2019. Compound open-channel flows: effects of transverse currents on the flow structure. Journal of Fluid Mechanics (Accepted).
- CHETIBI, M., PROUST, S., BENMAMAR, S. – 2019. Transverse surface waves in steady uniform and non-uniform flows through emergent and weakly submerged square cylinders. Journal of Hydraulic Research. DOI: 10.1080/00221686.2019.1647885
- PERRET, E., BERNI, C., CAMENEN, B., HERRERO, A., EL KADI ABDERREZZAK, K. – 2018. Transport of moderately sorted gravel at low bed shear stresses: The role of fine sediment infiltration. Earth Surface Processes and Landforms, vol. 43, n° 7, p. 1416-1430
- BERNI, C., PERRET, E., CAMENEN, B. – 2018. Characteristic time of sediment transport decrease in static armour formation. Geomorphology, vol. 317, p. 1-9
- PROUST, S., FERNANDES, J.N., LEAL, J.B., RIVIERE, N., PELTIER, Y. – 2017. Mixing layer and coherent structures in compound channel flows: effects of transverse flow, velocity ratio and vertical confinement . Water Resources Research, vol. 53, n° 4, p. 3387-3406.
- DUPUIS, V., PROUST, S., BERNI, C., PAQUIER, A. – 2017. Compound channel flow with a longitudinal transition in hydraulic roughness over the floodplains. Environmental Fluid Mechanics, vol. 17, n° 5, p. 903-928
- DUPUIS, V., PROUST, S., BERNI, C., PAQUIER, A. – 2017. Mixing layer development in compound channel flows with submerged and emergent rigid vegetation over the floodplains. Experiments in Fluids, vol. 58, n° 30, 18 p.
- HERRERO, A., BERNI, C. – 2016. Sand infiltration into a gravel bed: a mathematical model. Water Resources Research, vol. 52, 14 p.
- DUPUIS, V., PROUST, S., BERNI, C., PAQUIER, A. – 2016. Combined effects of bed friction and emergent cylinder drag in open channel flow. Environmental Fluid Mechanics, vol. 16, n° 6, p. 1173-1193