Laboratoire d’Hydraulique Saint-Venant
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Frédérique LARRARTE

Chercheure Associée LHSV (90%)

Université Gustave Eiffel / Laboratoire d'Hydraulique Saint-Venant

Champs d'intérets

  • mécanique des fluides , transport solide, expérimentations, instrumentation, domaine maritime

Supervision

  • Elisa Béteille

Education

  • 2006   Habilitation à Diriger des Recherches, Université de Caen – Basse Normandie,
  • 1994   Doctorat en Dynamique des Fluides et des Transferts de l'Université de Nantes et de l'Ecole Centrale de Nantes
  • 1990   Diplôme d'Etudes Approfondies (D.E.A.) en hydrodynamique navale de l'Ecole Nationale Supérieure de Mécanique de Nantes.
  • 1990   Diplôme de spécialisation de la Section Spéciale d'Hydrodynamique Navale Avancée de l'ENSM (devenue ECN) de Nantes.

 

Thèse

Publications

  • Force - frequency relationship in front crawl swimming
    • Brunel Thomas
    • Clanet Christophe
    • Larrarte Frédérique
    • Cohen Caroline
    • Carmigniani Rémi
    , 2025 . Force - frequency relationship in front crawl swimming
  • Dam-break flow over various obstacles configurations
    • Beteille Elisa
    • Larrarte Frederique
    • Boyaval Sebastien
    • Demay Eric
    • Le Minh-Hoang
    Journal of Ecohydraulics, Taylor & Francis , 2025, 63, pp.156-170 . Fast floods resulting from the failure of hydraulic structures can be characterized by ‘dam-break’ type waves. They pose catastrophic risks to downstream populations and result in severe structural damage, especially in urban areas. To assess and mitigate these risks, it is essential to forecast the influence of urban forms on flooding severity at a global scale. This paper provides datasets from reduced-scale physical experiments of transient flow through various obstacles configurations. The experiments are conducted in a rectangular horizontal open channel, where flow conditions are achieved by rapidly opening a gate holding a volume of water. To assess the impact of obstacle configurations on flow behaviour, two obstacle sizes are investigated, along with one idealized city layout. The experiments provide complete water hydrographs upstream and downstream of the gate. Additionally, the good performance of the code_saturne computational fluid dynamics (CFD) solver and the volume-of-fluid (VOF) method in numerically simulating the experiments is demonstrated. (10.1080/00221686.2025.2460020)
    DOI : 10.1080/00221686.2025.2460020
  • Experimental analysis on the influence of urban forms on unsteady urban flooding
    • Beteille Elisa
    • Boyaval Sébastien
    • Larrarte Frédérique
    • Demay Eric
    , 2025 . Unsteady urban flooding, such as dam-break waves, poses catastrophic risks to downstream populations and results in severe damage. To assess and mitigate these risks, it is essential to forecast the influence of urban forms on flooding severity. In this paper, datasets are provided from reduced-scale physical experiments of transient flow through idealized suburban districts. The experiments are conducted in a rectangular horizontal open channel, where flow conditions are achieved by rapidly opening a gate holding a volume of water. To evaluate the impact of urban forms on flow behavior, we investigated two urban parameters; the number and width of streets in the main direction of the flow. The experiments provide complete water hydrographs for thirteen urban forms. Conductive and acoustic gauges are positioned at different locations to track the wavefront and water depth variation. The results illustrate the impact of the two studied urban parameters on flow variables and provide valuable validation data for computational urban planning models.
  • Floods in housing estate : some experimental data
    • Larrarte Frédérique
    • Doumic Augustin
    • Goutal Nicole
    , 2022, pp.6 p., photos, graph. . The water cycle can be affected by violent events such as earthquakes, tsunamis, floods, ... In France, 17 millions of inhabitants are exposed to flood risk. One challenge during floods is to be able to access to people refugee over buildings. In order to investigate the hydraulic context generated by the grouped obstacles representative of a submerged housing estate, a preliminary experimental study was conducted. We experimentally study the flow in the presence of rows of macro-roughnesses representative of a submerged housing estate, and this for situations representing both current and more intense floods. After presenting the experimental configurations, the experimental results are given and discussed. The first conclusions are completed by the perspectives. (10.3850/iahr-39wc2521716x2022577)
    DOI : 10.3850/iahr-39wc2521716x2022577
  • Structure of open-channel flows through an array of square cylinders
    • Oukacine Marina
    • Larrarte Frédérique
    • Goutal Nicola
    Urban Water Journal, Taylor & Francis , 2022, 19 (7), pp.12 p. . The impact of obstacles on the hydrodynamic flow structure is of major interest since such flows are representative of flooded urban areas. This study focuses on a pattern depicting a single-family home and garden area, as found in recent suburban development. The purpose herein is to analyze the evolution of the velocity distribution for a densely built area as well as for emerged to slightly submerged situations, which represent various flood situations ranging from commonplace to extreme. Free-surface flows through an in-line distribution of square cylinders were investigated in a laboratory flume, in the aim of assessing the effect of relative submergence on the flow structure within the cylinder array. The results show that the lines of square cylinders channelize the flow. Moreover, the submerged case generated similar flow characteristics below the top of the cylinders, which drastically changed once the water flowed above the square cylinder level. (10.1080/1573062X.2022.2075771)
    DOI : 10.1080/1573062X.2022.2075771
  • Real time instability of flow close to a scour affected abutment
    • Chevalier Christophe
    • Larrarte Frédérique
    Environmental Fluid Mechanics, Springer Verlag , 2022, 22, pp.495–510 . For centuries, the interaction between the transport and hydrographic networks represents a signifcant issue in a country such as France. For example, the French railway network includes 1700 river-crossing structures and an important length of embankments either forming river banks or adjacent to watercourses exposed to scouring processes. Recently, various cases highlight the importance and vulnerability of civil transport works in relation to their environmental hazards, e.g. foods, and therefore the need to develop integrated observation tools and warning systems in the aim both of optimizing the management system and of increasing the knowledge on real scour processes. This paper relies to a French research project named SSHEAR which objective is to improve understanding of the scouring process through the use of innovative observation tools and physical and numerical hydraulic modelling. This part of the project aims at improving continuous monitoring in order to follow the evolution of the scour processes of a given bridge or abutment. After a presentation of the experimental site, the instrumentation is described as well as its in situ implementation. The data analysis process is given and results are commented before the presentation of some perspectives part. (10.1007/s10652-022-09842-9)
    DOI : 10.1007/s10652-022-09842-9
  • Drafting of 2 swimmers
    • Bolon Baptiste
    • Pretot Charlie
    • Clanet Christophe
    • Larrarte Frédérique
    • Carmigniani Rémi Arthur
    , 2021, pp.1 p. . Open water swimming is a very tactical sport. As in cycling, competitors often swim in peloton formations. Therefore, their position in the group is crucial to optimize drafting, either to preserve their physical strength, to quickly pass a lead swimmer or to impede the passing of an opponent. This work is an experimental study of the drag on 2 swimmers scaled models.
  • Chapter 3: Water level and discharge measurements
    • Larrarte Frédérique
    • Lepot Mathieu
    • Clemens-Meyer Francois
    • Bertrand-Krajewski Jean-Luc
    • Ivetić Damjan
    • Prodanović Dusan
    • Stegeman Bram
    , 2021, pp.35-104 . The knowledge of water levels and discharges in urban drainage and stormwater management (UDSM) systems is of key importance to understand their functioning and processes, to evaluate their performance, and to provide data for modelling. In this chapter, devoted mainly to underground combined and separate sewer pipe systems, various methods and technologies are described and discussed. After an introduction to important aspects to deal with when measuring discharges in sewer systems, the following parts are presented successively: (i) measurement of water level with rulers, and pressure, ultrasonic and radar sensors, (ii) measurement of flow velocity with ultrasonic, Doppler, velocity profiler, free surface, and electromagnetic sensors, (iii) direct measurement of discharge with pre-calibrated devices, physical scale models, computational fluid dynamics modelling and use of pumping stations, and (iv) detection and/or measurement of infiltration into and exfiltration from sewers, with flow or pressure measurements, tracer experiments, distributed temperature sensing and geophysical methods. (10.2166/9781789060119_0035)
    DOI : 10.2166/9781789060119_0035
  • Investigation of the hydraulics in flooded housing estate
    • Doumic Augustin
    • Larrarte Frédérique
    • Rtimi Rajae
    • Goutal Nicole
    , 2021, pp.9 p., graph., photos. . Climate change is currently taking place at the scale of our planet, leading to aviolent response from the environment, particularly with regard to the water cycle. One of the risk is already floods. As an example, in France, the average annual costof damages caused by floods (and insured under the Natural Disaster plan) amounts to 520 million euros. In metropolitan France, nearly 17 million people, about aquarter of the national population, are exposed to the risk of flooding by overflowaccording to the preliminary flood risk assessment carried out by the State in 2011.And with climate evolution, floods will become more frequent and more intense. Onechallenge during floods is to be able to access to people refugee over buildings.In order to investigate the hydraulic context generated by the grouped obstaclesrepresentative of a submerged housing estate, both an experimental and numericalstudy is being conducted.We experimentally study the flow in the presence of rows of macro-roughnesses representative of a slightly emerged and of a submerged housing estate, and this for situations representing both current and more intense floods. Measurements of the velocity field will provide information on currents distribution that might affect an evacuation process. In parallel a numerical study is also conducted with the opensource code Saturne. The numerical results are compared to experimental results and this preliminary stupy opens the way to a systematic investigation. (10.1007/978-981-19-1600-7_19)
    DOI : 10.1007/978-981-19-1600-7_19
  • Experimental flows through an array of emerged or slightly submerged square cylinders over a rough bed
    • Oukacine Marina
    • Proust Sébastien
    • Larrarte Frédérique
    • Goutal Nicole
    Scientific Data, Nature Publishing Group , 2021, 8 (1) . The experimental dataset presented was collected in an 18 m long and 1 m wide laboratory flume. Low to high flood flows through an urbanized floodplain were modelled. The floodplain bed is rough, modelled with dense artificial grass. A square cylinder array, representing house models, was set on the rough bed. The cylinder immersion rate was varied: cylinders are emerged for three flow cases and slightly submerged for one case. The experimental dataset comprises water levels, measured using an ultrasonic transit time probe, velocities across the channel measured using an Acoustic Doppler Velocimetry with a side looking probe, and velocities in longitudinal-vertical planes measured using Particle Image Velocimetry. These data could help understanding the physical processes associated with high flood flows through urbanized floodplains, with a focus on the transition from emerged to submerged obstacles. They could also be used as benchmark data to assess the ability of numerical models from one to three-dimensions to estimate the flood hazard (water depth, velocity) over a wide range of flood event magnitudes. (10.1038/s41597-020-00791-w)
    DOI : 10.1038/s41597-020-00791-w
  • Drafting of two passive swimmer scale models for open-water races
    • Bolon B
    • Pretot C
    • Clanet Christophe
    • Larrarte Frédérique
    • Carmigniani R
    Soft Matter, Royal Society of Chemistry , 2020, 16 (31), pp.7270-7273 . The interaction between two passive human swimmer scale models is investigated both experimentally and numerically. The Froude number, comparing the swimming velocity to the characteristic wave velocity, is conserved in the study. The interaction is quantified for a large range of relative positions and for three speeds corresponding to cruising, average, and sprint swimming. The associated computational fluid dynamics study using OpenFoam allows us to determine the relative positions that optimize the drafting during an open-water race: just behind a lead swimmer or at the level of the hip of a neighbor, with reductions of drag of 40% and 30%, respectively. (10.1103/PhysRevFluids.00.004800)
    DOI : 10.1103/PhysRevFluids.00.004800
  • Hydraulics and bridges: A French case study of monitoring of a bridge affected by scour
    • Larrarte Frédérique
    • Chevalier Christophe
    • Battist Louis
    • Chollet Hugues
    Flow Measurement and Instrumentation, Elsevier , 2020, 74, pp.101783 . Bridges are one of the oldest types of civil engineering structures and the interaction between the transport and hydrographic networks represents a significant issue in a country such as France. Recently, various cases highlight the importance and vulnerability of civil transport works in relation to their environmental hazards, e.g. floods, and therefore the need to develop integrated observation tools and warning systems in the aim both of optimizing the management system and of increasing the knowledge on real scour processes. This paper reports on the field approach task of a research project aiming at improving continuous monitoring in order to follow the evolution of the scour processes of a given bridge or abutment. The first step has been to identify a pilot site, representative of scour vulnerability. After a report of the scour parameters to be monitored, the benchmark study and the choice of monitoring devices available on the market are detailed. Instrumentation, sensor adaptability, limitations (actual measurement ranges, ergonomics, energy supply limits ...) and in situ implementation are then presented and discussed. Finally, preliminary measurements, post-treatments and interpretation are detailed. (10.1016/j.flowmeasinst.2020.101783)
    DOI : 10.1016/j.flowmeasinst.2020.101783
  • Large Eddy Simulation for flows through emerged or slightly sub-merged square obstacles
    • Oukacine Marina
    • Rtimi Rajae
    • Goutal Nicole
    • Larrarte Frédérique
    • Loizeau Vincent
    • Benhamadouche Sofiane
    • Proust Sébastien
    , 2020, pp.8 p. . As a result of climate change, we believe that extreme floods will become more frequent and more intense. The flows through obstacles representing an urbanized floodplain is realised in a laboratory at Re = 4766 and 8580. The purpose of the present study is first to validate a numerical model using Large Eddy Simulation (LES) against experimental data regarding the average longitudinal velocity and the secondary vortices formation. Then, additional data can be obtained and quantified. Therefore the geometrical parameters can be changed and their influence analysed and compared to the literature. A good agreement was found between simulated and experimental vertical profiles of time averaged velocity for the flow through emerged or slightly submerged obstacles. The additional simulations highlight that the flow structure is mostly driven by the transverse aspect ratio using the distance between two adjacent obstacles.
  • Soils, Structures and Hydraulics: Expertise and Applied Research (SSHEAR) Project
    • Chevalier Christophe
    • Schmidt Franziska
    • Larrarte Frédérique
    • Cheetham Mark
    • Durand Edouard
    • Sergent Philippe
    • Gondret Philippe
    • de La Roque Sidoine
    , 2019, pp.6p . The phenomenon of scouring represents a significant contributing factor in the destabilizing and destruction of civil structures (bridges, earth embankments and buildings) during major flood events, yet our understanding of the mechanisms involved remains highly empirical. These erosive processes are complex and involve many disciplines including soil, fluid and structural mechanics. To overcome the reliance on empiricism, while building general knowledge and proposing optimized methods aimed at diagnostics, advanced warning procedures and infrastructure management, a consortium comprising six complementary partners has been formed within the project SSHEAR (?Soils, Structures and Hydraulics: Expertise and Applied Research?) financially supported by the French National Research Agency (ANR). After a presentation of the project, a first assessment of the achieved results is proposed: experimental developments; numerical modelling; feedback in the field.
  • A French experience of Structural Health Monitoring of scour affecting river infrastructures
    • Larrarte Frédérique
    • Schmidt Franziska
    • Durand Edouard
    • Bontemps Arnaud
    • Della Longa Yannick
    • Cheetham Mark
    • de La Roque Sidoine
    • Hosseingholian Mohsen
    • Chevalier Christophe
    , 2019, pp.3p. . This paper presents a French experience of SHM of structures affected by scour
  • A French experience of continuous scour monitoring on real sites
    • Larrarte Frédérique
    • Chollet Hugues
    • Battist Louis
    • Dela Longua Yannick
    • Chevalier Christophe
    , 2019, pp.7p . Controlling the risk of scouring of structures, beds or banks due to natural hazards (floods, floods, extreme hydraulic regimes, dam failures) is a major challenge for sustainable development and land use planning. These processes are the main cause of destruction of buildings (civil engineering structures, earthworks, buildings) during major floods. The SSHEAR project, "Soils, Structures and Hydraulics: Expertise and Applied Research? has been set up to improve scour mechanisms knowledge, to develop innovative experimental and observational tools and hydraulic numerical models at both laboratory and full-scale, and then to build optimized diagnostic, warning and management methods for bridges operators. This paper reports on the ?field approach? task of SSHEAR project.. Among the work carried out, we have investigated whether relatively inexpensive methods using commercial sensors can be implemented. After a shot remembering of the scour parameters to be monitored, the benchmark study and the choice of monitoring devices available on the market have been detailed. The preliminary results presented here show that the challenge is being met. (10.3850/38WC092019-0410)
    DOI : 10.3850/38WC092019-0410
  • Some elements about scale effect on scour studies
    • Larrarte Frédérique
    • Schmidt Franziska
    • Boujia Nisrine
    • Vidal Vincent
    • Bontemps Arnaud
    • de La Roque Sidoine
    • Chevalier Christophe
    , 2019, pp.7p . To study the effect of scour on bridge structures, it is necessary to take into account the scale of the problem. To understand the vibrations of a structure, as for example a bridge pier affected by scour phenomenon, several experiments are in complementarity: first the behavior of reduced scale bridge piers can be studied in a hydraulic flume, where all conditions are taken so that the soil is scoured, second, the real-scale dynamical behaviour of bridge piers can be monitored and analyzed. Both approaches are presented here, and the complementary aspect of the results is shown. (10.3850/38WC092019-0748)
    DOI : 10.3850/38WC092019-0748
  • Projet de recherche ANR SSHEAR sur les affouillements (Janvier 2015-Septembre 2019): journée publique de restitution
    • Chevalier Christophe
    • Larrarte Frédérique
    • Schmidt Franziska
    , 2019, pp.40p. . Les processus d'affouillement sont une cause importante de destruction des constructions (ouvrages d'art et ouvrages en terre) notamment lors des crues majeures mais leur prise en compte reste trop empirique. Depuis 2015 et pendant plus de 4 ans, le projet ANR SSHEAR pour « Sols, Structures et Hydraulique : Expertise et Recherche Appliquée » a regroupé 6 partenaires (Ifsttar, Cerema, UMR FAST, Vinci Autoroutes, SNCF réseau et IRT Railenium) dans l'objectif d'améliorer les connaissances sur les mécanismes d'affouillement et de développer de nouveaux outils d'observation et de modélisation à toutes les échelles. Pour cela, les travaux se sont articulés autour de 3 axes scientifiques et techniques : L'approche « Modèle » comportant 2 volets, expérimental et numérique, visant à améliorer la compréhension des processus d'affouillement, l'instrumentation des ouvrages réels et la modélisation numérique des phénomènes observés en laboratoire et sur le terrain. L'approche « Terrain » ayant pour objectif de développer des outils et une méthodologie pour une meilleure caractérisation et un meilleur suivi des sites vis-à-vis des processus d'affouillements. La phase finale d'« Appropriation » par les gestionnaires et praticiens ayant pour but la transmission et la valorisation des résultats du projet pour améliorer la pratique.
  • Research program SSHEAR : recent advances on the understanding and the control of scour phenomena
    • Chevalier Christophe
    • Larrarte Frédérique
    • Schmidt Franziska
    • Pham-Van-Bang Damien
    • Durand Edouard
    • Gondret Philippe
    • de La Roque Sidoine
    • Cheetham Mark
    • Hosseingholian Mohsen
    , 2018 .
  • Scour monitoring on bridge pier - methodology and implementation
    • Florens Emma
    • Chevalier Christophe
    • Larrarte Frédérique
    • Schmidt Franziska
    • Durand Edouard
    , 2018, 40, pp.8p . Managing the scour risk of civil structures such as bridge piers, constitutes a major challenge to sustainable development and land use planning. The SSHEAR project aims to build optimized diagnostic, warning and management methods to benefit civil structures. This article is focused on the "Field" approach of the project that develop continuous and real-time scour monitoring. Based on theoretical approach and river database analysis, requirement specifications definition allowed to choose relevant devices to monitor scour. To complete this monitoring system, vibration-based monitoring will also be installed. (10.1051/e3sconf/20184003020)
    DOI : 10.1051/e3sconf/20184003020
  • Projet ANR SSHEAR : développements récents sur la compréhension et la maitrise des risques d'affouillements
    • Chevalier Christophe
    • Larrarte Frédérique
    • Schmidt Franziska
    • Pham-Van-Bang Damien
    • Durand Edouard
    • Gondret Philippe
    • de La Roque Sidoine
    • Cheetham Mark
    • Hosseingholian Mohsen
    , 2018, pp.4p . Depuis 2015, le projet ANR SSHEAR (« Sols, Structures et Hydraulique : Expertise et Recherche Appliquée ») met en synergie les compétences de 6 partenaires pour avancer sur la compréhension et la maîtrise des risques d'affouillement. Après une présentation du projet, un premier bilan des résultats obtenus est proposé : développements expérimentaux, modélisation numérique, observations de terrain.
  • Compréhension et maîtrise des risques d'affouillements: développements récents
    • Chevalier Christophe
    • Larrarte Frédérique
    • Larrarte Frédérique
    • Schmidt Franziska
    • Pham van Bang Damien
    • Durand Edouard
    • Gondret Philippe
    • de La Roque Sidoine
    • Cheetham Mark
    • Hosseingholian Mohsen
    , 2017, pp.10p . Les processus d'affouillement sont une cause importante d'instabilité et de destruction des ouvrages (ponts, ouvrages en terre et bâtiments) notamment lors des crues majeures. La prise en compte de ces phénomènes d'érosion reste trop empirique, notamment parce qu'ils sont particulièrement complexes et font intervenir de nombreux champs disciplinaires : mécanique des sols, des fluides, des structures... Dans la perspective de dépasser cet empirisme, de développer les connaissances et finalement d'améliorer les méthodes de diagnostic, d'alerte et de gestion, le projet SSHEAR (« Sols, Structures et Hydraulique : Expertise et Recherche Appliquée ») met en synergie les compétences de 6 partenaires avec le soutien de l'ANR (« Agence Nationale de la Recherche »). Dans cette communication, après une présentation du projet, un premier bilan des résultats obtenus depuis le démarrage en 2015 est proposé : développements expérimentaux, modélisation numérique, observations de terrain.