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| Bennis, Anne-claire; Furgerot, Lucille; Bailly Du Bois, Pascal; Dumas, Franck; Odaka, Tina; Lathuilière, Cyril; Filipot, Jean-francois. |
| Modelling three-dimensional wave-current-turbulence interactions in extreme tidal environments is still challenging and necessary for the development of the tidal industry, particularly for the dimensioning of tidal converters. Following this objective, we focus our study on the most energetic tidal site in Western Europe, the Alderney Race (France). Due to the strong tidal current at this location, wave-current interactions were poorly studied by the past and often neglected. We propose to assess how they impact the Alderney Race hydrodynamic by the use of numerical modelling and in-situ measurements. In this study, the following wave-current interactions were observed: (i) Stokes drift effects inducing an increase/decrease in the current depending on the... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00599/71155/73092.pdf |
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| Odaka, Tina; Banihirwe, Anderson; Eynard-bontemps, Guillaume; Ponte, Aurelien; Maze, Guillaume; Paul, Kevin; Baker, Jared; Abernathey, Ryan. |
| The Pangeo ecosystem is an interactive computing software stack for HPC and public cloud infrastructures. In this paper, we show benchmarking results of the Pangeo platform on two di erent HPC sys- tems. Four di erent geoscience operations were considered in this bench- marking study with varying chunk sizes and chunking schemes. Both strong and weak scaling analyses were performed. Chunk sizes between 64MB to 512MB were considered, with the best scalability obtained for 512MB. Compared to certain manual chunking schemes, the auto chunk- ing scheme scaled well. |
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Palavras-chave: Pangeo; Interactive computing; HPC; Cloud; Benchmarking; Dask; Xarray. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00597/70946/69187.pdf |
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| Melnikov, V; Odaka, Tina; Jensen, P; Hirano, T. |
| A theoretical investigation of the (X) over tilde (2)A '' and (A) over tilde (2)A' electronic states of the HO2 radical is reported. Both electronic states have nonlinear equilibrium geometries and they correlate with a (2)Pi state at linear geometries so that they exhibit the Renner effect. In highly excited bending states, there is tunneling between two equivalent minima (with geometries where the H nucleus is bound to one, or the other, of the two O nuclei), and the two linear geometries H-O-O and O-O-H become accessible to the molecule. Thus, HO2 affords an example of the so-called double Renner effect. Three-dimensional potential energy surfaces for the (X) over tilde (2)A '' (A) over tilde (2)A' and electronic states of HO2 have been calculated ab... |
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| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4202.pdf |
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