Výsledky vyhledávání

Scalings of turbulence dissipation in space and time for turbulent channel flow

Autor: A. Apostolidis, J.P. Laval, J.C. Vassilicos

Publikováno v: Journal of Fluid Mechanics
Journal of Fluid Mechanics, 2022, 946, pp.A41. ⟨10.1017/jfm.2022.627⟩

We investigate scalings of turbulence dissipation and turbulence length/time scales in the fully developed turbulent channel flow region of wall distances $y$ where the ratio of turbulence production to turbulence dissipation oscillates close to 1. F

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1762f605b6558e4dc2c10a32f7196064
https://doi.org/10.1017/jfm.2022.627

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Highly Transparent Fluorotellurite Glass-Ceramics: Structural Investigations and Luminescence Properties

Autor: Philippe Thomas, Jean-René Duclere, Gaëlle Delaizir, Cécile Genevois, Julie Cornette, Maggy Dutreilh-Colas, Mathieu Allix, Vincent Couderc, Vincent Sarou-Kanian, Sébastien Chenu, Franck Fayon, J.P. Laval, Pierre-Eugène Coulon

Publikováno v: Inorganic Chemistry
Inorganic Chemistry, American Chemical Society, 2019, 58 (24), pp.16387-16401. ⟨10.1021/acs.inorgchem.9b01955⟩
Inorganic Chemistry, 2019, 58 (24), pp.16387-16401. ⟨10.1021/acs.inorgchem.9b01955⟩

International audience; Crystallization from glass can lead to the stabilization of metastable crystalline phases, which offers an interesting way to unveil novel compounds and control the optical properties of resulting glass-ceramics. Here, we repo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::229861156bd787898e418a9c9677e66a
https://hal.archives-ouvertes.fr/hal-02443274/document

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Cationic ordering in tysonite type structures: III: Crystal structure of Ba5U4F26, the first fully ordered superstructure of anion-deficient tysonite

Autor: J.P. Laval, Richard Mayet

Publikováno v: Journal of Fluorine Chemistry
Journal of Fluorine Chemistry, Elsevier, 2019, 218, pp.63-68. ⟨10.1016/j.jfluchem.2018.11.016⟩

Ba5U4F26, the first fully ordered superstructure deriving from tysonite type with anionic deficit is prepared by annealing, below 983 K, the high temperature Ba1+xU1-xF6-2x tysonite solid solution for x = 0.11. It is structurally characterized in the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7940039d99670d6567fe91a22d071ebc
https://hal-unilim.archives-ouvertes.fr/hal-02439568

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Microphases deriving from Ba 2 ZrF 8 structure type: II: Crystal structure of Sr 17 Zr 9 F 70 and Sr 17.145 Zr 9 F 70.29

Autor: Hamid Rafik, J.P. Laval, Gilles Trolliard

Publikováno v: Journal of Solid State Chemistry
Journal of Solid State Chemistry, Elsevier, 2018, 260, pp.151-158. ⟨10.1016/j.jssc.2018.01.005⟩

In the domain Sr1−xZrxF2+2 × studied at 670 °C between the limits 0.333 ≤ x ≤ 0.353, Sr2ZrF8 (x = 0.333) cannot be obtained under our synthesis conditions but a new phase Sr17Zr9F70 (x = 0.346) is characterized which clearly shows a great ana

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c29c4b33765c3e740b4bec1ad0f7daf
https://hal-unilim.archives-ouvertes.fr/hal-01886177

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Structural study of (N2H5,H)2.9U1.1Ce0.9(C2O4)5·10H2O from a conventional X-ray diffraction diagram obtained on a powder synthesized by a fast vortex process

Autor: E. Brackx, O. Dugne, J.P. Feraud, J.P. Laval, B. Arab-Chapelet

Publikováno v: Journal of Solid State Chemistry
Journal of Solid State Chemistry, Elsevier, 2015, 221, pp.166-172. ⟨10.1016/j.jssc.2014.09.030⟩
Journal of Solid State Chemistry, 2015, 221, pp.166-172. ⟨10.1016/j.jssc.2014.09.030⟩

In the context of research on U/minor actinides for nuclear fuel reprocessing in the transmutation process, developments are first studied with surrogates containing uranium and lanthanides to facilitate testing. The tests consist of precipitating an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9102692bcdd49c6179496226b4998215
https://doi.org/10.1016/j.jssc.2014.09.030

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Cationic ordering in tysonite type structures: II: Crystal structure of α-, β- and γ-baryum hexafluoridouranates (IV)

Autor: Aziz Mikou, J.P. Laval, Richard Mayet

Publikováno v: Journal of Fluorine Chemistry
Journal of Fluorine Chemistry, Elsevier, 2017, 193, pp.126-135. ⟨10.1016/j.jfluchem.2016.11.002⟩

Three polymorphic varieties of BaUF 6 have been synthesized and their crystal structure determined by X-ray diffraction on single crystals. The high temperature α- BaUF 6 belongs to the disordered tysonite type and its structure is compared to BaThF

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8000627cf0b94df842e34d40220526b
https://hal-unilim.archives-ouvertes.fr/hal-01912676

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Corrigendum to 'Cationic ordering in tysonite type structures: III: Crystal structure of Ba5U4F26, the first fully ordered superstructure of anion-deficient tysonite' [J. Fluorine Chem. 218 (2019) 63–68]

Autor: J.P. Laval, Richard Mayet

Publikováno v: Journal of Fluorine Chemistry. 226:109358

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62ac6c276511d5bc6f233bb4eb8c1f78
https://doi.org/10.1016/j.jfluchem.2019.109358

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Alpha self-irradiation effect on the local structure of the U0.85Am0.15O2±x solid solution

Autor: Florent Lebreton, Aurélien Jankowiak, Thibaud Delahaye, Damien Prieur, Philippe Martin, Philippe Blanchart, Philippe Dehaudt, Andreas C. Scheinost, J.P. Laval

Publikováno v: Journal of Solid State Chemistry 194(2012), 206-211

Uranium-americium mixed oxides are promising fuels for achieving an efficient Am recycling. Previous studies on U{sub 0.85}Am{sub 0.15}O{sub 2{+-}x} materials showed that the high {alpha} activity of {sup 241}Am induces pellet swelling which is a maj

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62c4833745d32ce9ee1ea1654e08d401
https://doi.org/10.1016/j.jssc.2012.05.006

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Structural and Phase Transitions in the High Composition Domain of the System (1-x)Pb(Mg1/3Nb2/3)O3—xPbTiO3

Autor: Helmut Ehrenberg, S. Arrii-Clacens, H. Wang, Hartmut Fuess, Haosu Luo, J.P. Laval, Brahim Elouadi

Publikováno v: Ferroelectrics
Ferroelectrics, Taylor & Francis: STM, Behavioural Science and Public Health Titles, 2010, 400, pp.362-371. ⟨10.1080/00150193.2010.505857⟩

International audience; Raman scattering, dielectric studies, powder and single crystal X-ray diffraction on 0.6Pb(Mg1/3Nb2/3)O3-0.4PbTiO3 (PMN-40PT) and 0.55Pb(Mg1/3Nb2/3)O3-0.45PbTiO3 (PMN-45PT) were carried out over a wide temperature range. Diele

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf8a11bae64086e1edebe0eb9058fbf8
https://doi.org/10.1080/00150193.2010.505857

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