Výsledky vyhledávání - "Germain Rousseaux"

The dual nature of the dead-water phenomenology: Nansen versus Ekman wave-making drags

Autor: Johan Fourdrinoy, Madalina Petcu, Julien Dambrine, Morgan Pierre, Germain Rousseaux

Publikováno v: Proceedings of the National Academy of Sciences of the United States of America
Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2020, pp.16770-16775. ⟨10.1073/pnas.1922584117⟩
Proc Natl Acad Sci U S A

International audience; A ship encounters a higher drag in a stratified fluid compared to a homogeneous one. Grouped under the same “dead-water” vocabulary, two wave-making resistance phenomena have been historically reported. The first, the Nans

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::675269cdbee015fe2804d7c2c610635d
https://doi.org/10.1073/pnas.1922584117

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Correlations on weakly time-dependent transcritical white-hole flows

Autor: Johan Fourdrinoy, Scott Robertson, Nicolas James, Alessandro Fabbri, Germain Rousseaux

We report observations made on a run of transcritical flows over an obstacle in a narrow channel. Downstream from the obstacle, the flows decelerate from supercritical to subcritical, typically with an undulation on the subcritical side (known in hyd

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::807da83f7d0889245b8b5f3d180e2d09
http://arxiv.org/abs/2112.10472

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A new mechanism for generating a bolus within a double layer following Scott Russell

Autor: Germain Rousseaux, Johan Fourdrinoy, Morgan Pierre, Julien Dambrine, Madalina Petcu

While seeking to revisit an old experiment of John Scott Russell, we discovered a new mechanism for generating a non-shoaling bolus (an ovoid coherent mass of recirculating mixed fluids immerged in a surrounding medium/a of different density/ies) pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::607653dd2892a1df257bcb9cd08d8f04
https://doi.org/10.5194/egusphere-egu21-7301

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Scattering of Co-Current Surface Waves on an Analogue Black Hole

Autor: Alessandro Fabbri, Germain Rousseaux, Scott Robertson, Léo-Paul Euvé, Nicolas James

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Phys.Rev.Lett.
Phys.Rev.Lett., 2020, 124 (14), pp.141101. ⟨10.1103/PhysRevLett.124.141101⟩

We report on what is to our knowledge the first scattering experiment of surface waves on an accelerating transcritical flow, which in the analogue gravity context is described by an effective spacetime with a black-hole horizon. This spacetime has b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::912d170b1186a8348d20e4dc50e5afb5
http://hdl.handle.net/10261/222588

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Visco-elastic cosmology for a sparkling universe?

Autor: Stefan C. Mancas, Germain Rousseaux

Publikováno v: Gen.Rel.Grav.
Gen.Rel.Grav., 2020, 52 (6), pp.55. ⟨10.1007/s10714-020-02705-y⟩
General Relativity and Gravitation
General Relativity and Gravitation, Springer Verlag, 2020, 52 (6), pp.55. ⟨10.1007/s10714-020-02705-y⟩

We show the analogy between a generalization of the Rayleigh-Plesset equation of bubble dynamics including surface tension, elasticity and viscosity effects with a reformulation of the Friedmann-Lema\^itre set of equations describing the expansion of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e9815ef91b6e908c64180db285de036
https://hal.archives-ouvertes.fr/hal-02870847

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Effects of finite water depth and lateral confinement on ships wakes and resistance

Autor: Germain Rousseaux, Clément Caplier, Damien Calluaud, Laurent David

Publikováno v: Journal of Hydrodynamics
Journal of Hydrodynamics, Elsevier, 2019, ⟨10.1007/s42241-019-0054-9⟩

Wash waves produced by ships disintegrate river banks and coastal lines. This phenomenon of bank erosion is mainly due to the height of the waves. Various factors govern the formation of these waves and their amplitudes: the geometry of the water cha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db300188054f2a48d6997ad3589eb75a
https://hal.archives-ouvertes.fr/hal-02322698

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2D numerical contributions for the study of non-cohesive sediment transport beneath tidal bores

Autor: Yoga Satria Putra, Anthony Beaudoin, Serge Huberson, Germain Rousseaux, Lionel Thomas

Publikováno v: Comptes Rendus Mécanique
Comptes Rendus Mécanique, Elsevier, 2019, 347 (2), pp.166-180. ⟨10.1016/j.crme.2018.11.004⟩

2D numerical simulations of tidal bores were obtained using the OpenFOAM CFD software to solve the Navier–Stokes equations by means of the Finite Volume Method by applying a LES turbulence model. The trajectories of non-cohesive sediment particles

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39eae901d7c1decc73ec6f6bcb3b1888
https://hal.archives-ouvertes.fr/hal-02282788/file/S1631072118302444.pdf

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Negative energy waves in a shear flow with a linear profile

Autor: Yury Stepanyants, Germain Rousseaux, Philippe Maïssa

Publikováno v: European Journal of Mechanics-B/Fluids
European Journal of Mechanics-B/Fluids, Elsevier, 2016, 56, pp.192-199. ⟨10.1016/j.euromechflu.2016.01.003⟩

We present a derivation of the time averaged potential and kinetic energies for small-amplitude surface waves on a shear flow with constant vorticity. The effect of surface tension is also taken into consideration. It is demonstrated that the virial

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1ac02b8378c514829111e89e2f4e3bd
https://doi.org/10.1016/j.euromechflu.2016.01.003

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A novel method to generate tidal-like bores in the laboratory

Autor: Jean-Marc Mougenot, Damien Calluaud, Ludovic Chatellier, Laurent David, Germain Rousseaux

Publikováno v: European Journal of Mechanics - B/Fluids. 55:31-38

Laboratory experiments are reported where the analogue of a tidal bore is generated with a centimeter-scale local tidal range in a water channel. A discussion of the hydraulic regimes allows to set the experimental conditions to observe the bore. Tem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a1c503143c6bd08e05a5971c5abc45c6
https://doi.org/10.1016/j.euromechflu.2015.08.004

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Classical hydrodynamics for analogue space–times: open channel flows and thin films

Autor: Germain Rousseaux, Hamid Kellay

Publikováno v: Philos Trans A Math Phys Eng Sci
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Royal Society, The, 2020, 378 (2177), ⟨10.1098/rsta.2019.0233⟩

Here we review the way to build analogue spacetimes in open channel flows by looking at the flow phase diagram and the corresponding analogue experiments performed during the last years in the associated flow regimes. Thin films like the circular jum

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c51873f35dd059fcad69b894ac49e100
https://doi.org/10.1098/rsta.2019.0233

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