DECLIC : A facility to investigate Fluids and Transparent Materials in Microgravity conditions in ISS

Marcout, Romain; Raymond, G Kvaternik; Martin, Bernard J.; Cambon, G.; Zappoli, Bernard; Duclos, Fabienne; Barde, S.; Beysens, Daniel; Garrabos, Yves; Lecoutre, Carole; Billia, B.; Bergeon, N.; Mangelinck, N.

doi:10.2514/6.iac-06-a2.5.02

Cited by 10 publications

(13 citation statements)

References 5 publications

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“…Experiments discussed here were performed in the DSI of the DECLIC developed by the French space agency (CNES) and installed onboard the ISS [32,33,34]. The DECLIC-DSI setup is dedicated to in situ and real time characterization of the solid-liquid interface dynamics in 3D bulk samples of transparent materials.…”

Section: Microgravity Experimentsmentioning

confidence: 99%

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Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidification

et al. 2018

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We carry out three-dimensional phase-field simulations to model unique experimental observations of cellular and dendritic solidification structures formed under diffusive growth conditions in the DSI (Directional Solidification Insert) of the DECLIC (DEvice for the study of Critical LIquids and Crystallization) aboard the International Space Station. We had previously shown experimentally that complex thermal conditions affect the stationary position of the solid-liquid interface, as well as its dynamics of relaxation towards this stationary position over a finite time after the onset of sample pulling. Here, we discuss the effects of thermal diffusion within the adiabatic zone of the directional solidification setup and of latent heat release at the solid-liquid interface by means of quantitative phase-field simulations. Simulations and experiments characterize the entire evolution of the primary spacing of cellular/dendritic array structures from the onset of morphological instability to the establishment of the final steady-state spacing, including the transient coarsening regime associated with a sharp increase of spacing. Accounting for these thermal effects leads to a major improvement in the agreement between simulations and microgravity measurements for both the time of occurrence of morphological instability after the start of the experiment and the subsequent spacing evolution, which are not accurately predicted using the standard frozen temperature approximation.

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Section: Microgravity Experimentsmentioning

confidence: 99%

“…Transparency of the crucible also permits transversal imaging, thus providing both side view and top view images of the solidifying microstructure. More details on the DECLIC-DSI setup and experiments can be found elsewhere [19,22,30,32,33,34,35,36].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidification

et al. 2018

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“…The DECLIC-Directional Solidification Insert (DSI) mainly contains two elements: the Bridgman furnace and the experimental cartridge. Complete descriptions of DECLIC and of its inserts can be found elsewhere [22,23]. The experimental cartridge includes a quartz crucible and a system of volume compensation.…”

Section: Experimental and Observation Modementioning

confidence: 99%

“…The study presented here was conducted onboard the International Space Station (ISS) in the framework of the CNES project MISOL3D (Microstructures de Solidification 3D) and NASA project DSIP (Dynamical Selection of 3D Interface Patterns). Experiments were realized using the Directional Solidification Insert (DSI) of the Device for the study of Critical Liquids and Crystallization (DECLIC) developed by the French Space Agency (CNES), which is dedicated to in situ and real-time characterization of the dynamical selection of the solid-liquid interface morphology on bulk samples of transparent materials [19,22,23]. Results are also compared to identical experiments performed on ground after the return on Earth of the DSI to assess the effects of convection.…”

Section: Introductionmentioning

confidence: 99%

Initial transient behavior in directional solidification of a bulk transparent model alloy in a cylinder

et al. 2015

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“…The DECLIC experimental setup was described extensively in previous publications [ 30 , 41 , 42 ]. DECLIC used Alice Like Instrumentation (ALI) to carry out phase separation experiments near the critical point of SF

at room temperature in the weightlessness.…”

Section: Methodsmentioning

confidence: 99%

Measuring the Transition Rates of Coalescence Events during Double Phase Separation in Microgravity

et al. 2017

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Phase transition is a ubiquitous phenomenon in nature, science and technology. In general, the phase separation from a homogeneous phase depends on the depth of the temperature quench into the two-phase region. Earth’s gravity masks the details of phase separation phenomena, which is why experiments were performed under weightlessness. Under such conditions, the pure fluid sulphur hexafluoride (SF6) near its critical point also benefits from the universality of phase separation behavior and critical slowing down of dynamics. Initially, the fluid was slightly below its critical temperature with the liquid matrix separated from the vapor phase. A 0.2 mK temperature quench further cooled down the fluid and produced a double phase separation with liquid droplets inside the vapor phase and vapor bubbles inside the liquid matrix, respectively. The liquid droplets and the vapor bubbles respective distributions were well fitted by a lognormal function. The evolution of discrete bins of different radii allowed the derivation of the transition rates for coalescence processes. Based on the largest transition rates, two main coalescence mechanisms were identified: (1) asymmetric coalescences between one small droplet of about 20 μm and a wide range of larger droplets; and (2) symmetric coalescences between droplets of large and similar radii. Both mechanisms lead to a continuous decline of the fraction of small radii droplets and an increase in the fraction of the large radii droplets. Similar coalescence mechanisms were observed for vapor bubbles. However, the mean radii of liquid droplets exhibits a t1/3 evolution, whereas the mean radii of the vapor bubbles exhibit a t1/2 evolution.

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DECLIC : A facility to investigate Fluids and Transparent Materials in Microgravity conditions in ISS

Cited by 10 publications

References 5 publications

Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidification

Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidification

Initial transient behavior in directional solidification of a bulk transparent model alloy in a cylinder

Measuring the Transition Rates of Coalescence Events during Double Phase Separation in Microgravity

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