On the effect of injection of gas in the numerical simulation of accretion flows
文献类型：期刊论文
| 作者 | Bu DeFu ; Yuan Feng; Wu MaoChun; Yang XiaoHong
|
| 刊名 | SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
 |
| 出版日期 | 2010 |
| 卷号 | 53期号:1页码:139-142 |
| 关键词 | accretion accretion discs-black hole physics-hydrodynamics numerical |
| 英文摘要 | We investigate the effects of various ways of injection of gas at the outer boundary in the numerical simulations of non-viscous accretion flows. We study three models. In Model A, we inject material around the equatorial plane. In Models B and C, full-range theta injection is used (we employ spherical coordinates). In all three models, the injected material has the same density distribution with polar angle theta. From the equatorial region to the polar regions, angular momentum of the injected material of Model B decreases faster than that in Model C. For all of the models, after a transient episode of infall at the beginning of the simulations, the gas piles up in the equatorial regions outside the black hole and forms a thick torus bounded by a centrifugal barrier. We find that the accretion rates of Models B and C are more than ten times higher than that in Model A. In Model A, there is weak accretion only in the torus and outflows are found on the surface of the torus. In Model B, we find strong inflows on the surface of its torus, and the accretion in the torus is weak. In Model C, strong inflows also occur on the surface of its torus, but the accretion regions are narrower and there are strong outflows in its torus. In all of our models, the time-averaged density, pressure and angular momentum in the equatorial region can be described by a radial power law, with P proportional to r(-3/2), P proportional to r(--2) and l proportional to r(0). |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | ANGULAR-MOMENTUM MATERIAL ; BLACK-HOLES ; 2 DIMENSIONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000280291800032 |
| 公开日期 | 2011-06-29 |
| 源URL | [http://119.78.226.72//handle/331011/13371]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Bu DeFu,Yuan Feng,Wu MaoChun,et al. On the effect of injection of gas in the numerical simulation of accretion flows[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2010,53(1):139-142. |
| APA | Bu DeFu,Yuan Feng,Wu MaoChun,&Yang XiaoHong.(2010).On the effect of injection of gas in the numerical simulation of accretion flows.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,53(1),139-142. |
| MLA | Bu DeFu,et al."On the effect of injection of gas in the numerical simulation of accretion flows".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 53.1(2010):139-142. |
入库方式： OAI收割
来源：上海天文台
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