| タイトル | Rheological Properties of Quasi-2D Fluids in Microgravity |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150023461 |
| 著者（英） | Stannarius, Ralf; Hall, Nancy; Glaser, Matthew; Clark, Noel; Park, Cheol; Eremin, Alexey; Harth, Kirsten; Tin, Padetha; Trittel, Torsten; Maclennan, Joseph |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 2015-11-11 |
| 言語 | eng |
| 内容記述 | In recent years, research on complex fluids and fluids in restricted geometries has attracted much attention in the scientific community. This can be attributed not only to the development of novel materials based on complex fluids but also to a variety of important physical phenomena which have barely been explored. One example is the behavior of membranes and thin fluid films, which can be described by two-dimensional (2D) rheology behavior that is quite different from 3D fluids. In this study, we have investigated the rheological properties of freely suspended films of a thermotropic liquid crystal in microgravity experiments. This model system mimics isotropic and anisotropic quasi 2D fluids [46]. We use inkjet printing technology to dispense small droplets (inclusions) onto the film surface. The motion of these inclusions provides information on the rheological properties of the films and allows the study of a variety of flow instabilities. Flat films have been investigated on a sub-orbital rocket flight and curved films (bubbles) have been studied in the ISS project OASIS. Microgravity is essential when the films are curved in order to avoid sedimentation. The experiments yield the mobility of the droplets in the films as well as the mutual mobility of pairs of particles. Experimental results will be presented for 2D-isotropic (smectic-A) and 2D-nematic (smectic-C) phases. |
| NASA分類 | Physics (General) |
| レポートNO | GRC-E-DAA-TN27931 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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