| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Pereda, Jorge
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2021Effect of sub-boundaries on primary spacing dynamics during 3D directional solidification conducted on DECLIC-DSIcitations
- 2020Experimental characterization and theoretical analysis of cell tip oscillations in directional solidificationcitations
- 2018Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidificationcitations
- 2018Formation des microstructures de solidification dans des alliages transparents modèles des alliages métalliques ; Dynamics of solidification microstructure formation of transparent alloys under diffusive transport regime
- 2017Convection Effects During Bulk Transparent Alloy Solidification in DECLIC-DSI and Phase-Field Simulations in Diffusive Conditionscitations
- 2017Evolution of Primary Spacing during Directional Solidification of Transparent Bulk Samples Conducted on DECLIC-DSI
- 2016Dynamics of Microstructure Formation in 3D Directional Solidification of Transparent Model Alloys under Microgravity: Analysis of the Primary Spacing Evolution
- 2016In Situ and Real Time Observation of Microstructure Formation during Directional Solidification of a 3D-alloy: Experiments in the DECLIC-DSIcitations
Places of action
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article
Experimental characterization and theoretical analysis of cell tip oscillations in directional solidification
Abstract
International audience ; Experiments performed in DECLIC-DSI on board the International Space Station evidenced oscillatory modes during the directional solidification of a bulk sample of succinonitrile-based transparent alloy. The interferometric data acquired during a reference experiment, V p = 1 μm/s and G = 19 K/cm, allowed us to reconstruct the cell shape and thus measure the cell tip position, radius, and growth velocity evolution, in order to quantify the dynamics of the oscillating cells. This study completes our previous reports [Bergeon et al., Phys. Rev. Lett. 110, 226102 (2013); Tourret et al., Phys. Rev. E 92, 042401 (2015); Pereda et al., Phys. Rev. E 95, 012803 (2017)] with, to our knowledge, the first complete monitoring of the geometric cell tip characteristics variations in bulk samples. The evolution of the shape, velocity, and position of the tip of the oscillating cells is associated with an evolution of the concentration field, inaccessible experimentally but mediating the diffusive interactions between the cells. The experimental results are supported by 3D phase-field simulations which evidence the existence of transversal solute fluxes between neighboring cells that play a fundamental role in the oscillation dynamics. The dynamics of oscillation of an individual cell is analyzed using a theoretical model based on classical equations of solidification through the calculation of the phase relationships between oscillation of the different tip characteristics.