| タイトル | Simulation of gaseous diffusion in partially saturated porous media under variable gravity with lattice Boltzmann methods |
| 著者（英） | Or, Dani; Sukop, Michael C.; Chau, Jessica Furrer; Steinberg, S. L. |
| 発行日 | 2005-08-01 |
| 言語 | eng |
| 内容記述 | Liquid distributions in unsaturated porous media under different gravitational accelerations and corresponding macroscopic gaseous diffusion coefficients were investigated to enhance understanding of plant growth conditions in microgravity. We used a single-component, multiphase lattice Boltzmann code to simulate liquid configurations in two-dimensional porous media at varying water contents for different gravity conditions and measured gas diffusion through the media using a multicomponent lattice Boltzmann code. The relative diffusion coefficients (D rel) for simulations with and without gravity as functions of air-filled porosity were in good agreement with measured data and established models. We found significant differences in liquid configuration in porous media, leading to reductions in D rel of up to 25% under zero gravity. The study highlights potential applications of the lattice Boltzmann method for rapid and cost-effective evaluation of alternative plant growth media designs under variable gravity. |
| NASA分類 | Man/System Technology and Life Support |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/293891 |
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