| タイトル | A Numerical Turbulence Model for Multiphase Flows in the Protoplanetary Nebula |
| 本文（外部サイト） | http://hdl.handle.net/2060/19970006713 |
| 著者（英） | Dobrovolskis, Anthony R.; Cuzzi, Jeffrey N.; Champney, Joelle M. |
| 著者所属（英） | NASA Ames Research Center |
| 発行日 | 1995-07-01 |
| 言語 | eng |
| 内容記述 | It is thought that planets form from solid particles in a flattened, rotating, 99% gaseous nebula. These grains gradually coagulate into millimeter-to-meter sized aggregates which settle toward the midplane of the nebula. It is widely believed that the resulting dense layer eventually becomes gravitationally unstable and collapses into 'planetesimals.' A new numerical model is presented to simulate the predominant processes (gravitation, vertical convection, and shear-driven turbulence) during the stage while the particulate material is still dispersed about the midplane of the nebula. In our previous work, particles were assumed to be spheres of a single radius; in the present work, particles are spheres of different radii. Results indicate that neither a broad nor a narrow distribution of particle sizes is likely to become gravitationally unstable. |
| NASA分類 | Lunar and Planetary Exploration |
| レポートNO | 97N13607
NASA-TM-111896
NAS 1.15:111896 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/102411 |
