Three-dimensional foam flow resolved by fast X-ray tomographic microscopy
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2015
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| _version_ | 1866917218161262592 |
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| author | Raufaste, Christophe Dollet, Benjamin Mader, Kevin Santucci, Stéphane Mokso, Rajmund |
| author_facet | Raufaste, Christophe Dollet, Benjamin Mader, Kevin Santucci, Stéphane Mokso, Rajmund |
| contents | Thanks to ultra fast and high resolution X-ray tomography, we managed to capture the evolution of the local structure of the bubble network of a 3D foam flowing around a sphere. As for the 2D foam flow around a circular obstacle, we observed an axisymmetric velocity field with a recirculation zone, and indications of a negative wake downstream the obstacle. The bubble deformations, quantified by a shape tensor, are smaller than in 2D, due to a purely 3D feature: the azimuthal bubble shape variation. Moreover, we were able to detect plastic rearrangements, characterized by the neighbor-swapping of four bubbles. Their spatial structure suggest that rearrangements are triggered when films faces get smaller than a characteristic area. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1503_05785 |
| institution | arXiv |
| publishDate | 2015 |
| record_format | arxiv |
| spellingShingle | Three-dimensional foam flow resolved by fast X-ray tomographic microscopy Raufaste, Christophe Dollet, Benjamin Mader, Kevin Santucci, Stéphane Mokso, Rajmund Fluid Dynamics Soft Condensed Matter Thanks to ultra fast and high resolution X-ray tomography, we managed to capture the evolution of the local structure of the bubble network of a 3D foam flowing around a sphere. As for the 2D foam flow around a circular obstacle, we observed an axisymmetric velocity field with a recirculation zone, and indications of a negative wake downstream the obstacle. The bubble deformations, quantified by a shape tensor, are smaller than in 2D, due to a purely 3D feature: the azimuthal bubble shape variation. Moreover, we were able to detect plastic rearrangements, characterized by the neighbor-swapping of four bubbles. Their spatial structure suggest that rearrangements are triggered when films faces get smaller than a characteristic area. |
| title | Three-dimensional foam flow resolved by fast X-ray tomographic microscopy |
| topic | Fluid Dynamics Soft Condensed Matter |
| url | https://arxiv.org/abs/1503.05785 |