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- Michael Berhanu, Romain Monchaux, +11 authors R Scott Volk
- 2006

We report the first experimental observation of reversals of a dynamo field generated in a laboratory experiment based on a turbulent flow of liquid sodium. The magnetic field randomly switchesâ€¦ (More)

- Romain Monchaux, Michael Berhanu, +13 authors Florent Ravelet
- Physical review letters
- 2007

We report the observation of dynamo action in the von KÃ¡rmÃ¡n sodium experiment, i.e., the generation of a magnetic field by a strongly turbulent swirling flow of liquid sodium. Both mean andâ€¦ (More)

- Romain Monchaux, Florent Ravelet, BÃ©rengÃ¨re Dubrulle, Arnaud Chiffaudel, FranÃ§ois Daviaud
- Physical review letters
- 2006

We experimentally study the properties of mean and most probable velocity fields in a turbulent von KÃ¡rmÃ¡n flow. These fields are found to be described by two families of functions, as predicted by aâ€¦ (More)

- R Scott Volk, Florent Ravelet, +8 authors FranÃ§ois PÃ©trÃ©lis
- Physical review letters
- 2006

We study the effect of a turbulent flow of liquid sodium generated in the von KÃ¡rmÃ¡n geometry, on the localized field of a magnet placed close to the frontier of the flow. We observe that the fieldâ€¦ (More)

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching andâ€¦ (More)

- Aurore Naso, Romain Monchaux, Pierre-Henri Chavanis, BÃ©rengÃ¨re Dubrulle
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2010

A simplified thermodynamic approach of the incompressible axisymmetric Euler equations is considered based on the conservation of helicity, angular momentum, and microscopic energy. Statisticalâ€¦ (More)

- SÃ©bastien Poncet, Roland Schiestel, Romain Monchaux
- 2018

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching andâ€¦ (More)

- Romain Monchaux, Pierre-Philippe Cortet, +4 authors BÃ©rengÃ¨re Dubrulle
- Physical review letters
- 2008

We experimentally characterize the fluctuations of the nonhomogeneous nonisotropic turbulence in an axisymmetric von KÃ¡rmÃ¡n flow. We show that these fluctuations satisfy relations, issued from theâ€¦ (More)

- SÃ©bastien AumÃ¢Ä±tre, Michael Berhanu, +13 authors R Scott Volk
- 2013

The VKS experiment studies dynamo action in the flow generated inside a cylinder filled with liquid sodium by the rotation of coaxial impellers (the von KÃ¡rmÃ¡n geometry). We report observationsâ€¦ (More)

- M Couliou, Romain Monchaux
- Physical review. E
- 2016

We investigate the growth in the spanwise direction of turbulent spots invading a laminar flow in a plane Couette flow. Direct numerical simulation is used to track the nucleation of streaks duringâ€¦ (More)